Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 7612ea9cad7247cd…

MALICIOUS

PDF / .VIR

485.9 KB Created: 2023-12-19 17:14:26 Authoring application: Nitro PDF First seen: 2024-05-20
MD5: 3868dc956e24a698dfe9a4e12280de9c SHA-1: 275aeea128dbf34aa911547770375150f226c32d SHA-256: 7612ea9cad7247cd4e06e31e4b6fea3f43be03b06a650b31e0265d30a57a0526
246 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.6751

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • PDF carries website-builder CDN document link farm medium PDF_CDN_PDF_LINK_FARM
    PDF contains many clickable PDF links parked on website-builder CDNs or simple download gateways together with visible ebook, manual, or download lure text. This matches generated SEO document carriers used to route users through untrusted link/download chains; the PDF itself is an inert link carrier.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://wewem.obsidian.legal/5451479.pdf In PDF document text
    • http://modetupifa.sifirbiryemek.com/1597884.pdfIn PDF document text
    • https://graham-cracker-chocolate-chip-cookies.newiredaje.sbs/5951524.pdfIn PDF document text
    • http://adservice.google.com.kw/ddm/clk/445204615;249060672;c;;%3F//mos-access-2013-study-guide-pdf.cannabisebook.com/zeleboxidowas.pdfIn PDF document text
    • https://adservice.google.com.eg/ddm/clk/424929466;226923624;r;;%3F//img1.wsimg.com/blobby/go/2df60107-f6b5-41b6-b6f1-4748cbfb89a6/downloads/math_solution_class_7_bd.pdfIn PDF document text
    • https://fufixijipumod.octort.co.za/226928172355876451?jomilirovexezojuzafegamujexuzutewikufifowimaxazikewovakekoxebanijifokiwupawodekibulebufinu=rubawolujekusijixaxusemiwirazevesojikebiwilefibudulijixuforexoxaxixuzipedivulafopilijatizewinibapenogonedejazugasamakapezobomorinupenabiguregelizupojesagodekubutobuvofovaripazomogexedutamamagudajemufinirowi&utm_term=reading+comprehension+worksheets+for+11th+grade&sadobumivepabakejivesolugolusemaderifudutokunigetusovigodoxulamelekikuvuzedepadozewawuwurixiguxuka=bodumogewofiwaduvikagevewuxipebosuganatekijididepexapoxefamufatakeluzawuvesopizukenesofuboganisipavokafotutegororajapumIn PDF document text
    • https://fufixijipumod.octort.co.za/226928172355876451?jomilirovexezojuzafegamujexuzutewikufifowimaxazikewovakekoxebanijifokiwupawodekibulebufinu=rubawolujekusijixaxusemiwirazevesojikebiwilefibudulijixuforexoxaxixuzipedivulafopilijatizewinibapenogonedejazugasamakapezobomorinupenabiguregelizupojesagodPDF link annotation
    • https://fufixijipumod.octort.co.za/226928172355876451?jomilirovexezojuzafegamujexuzutewikufifowimaxazikewovakekoxebanijifokiwupawodekibulebufinu=rubawolujekusijixaxusemiwirazevesojikebiwilefibudulijixuforexoxaxixuzipedivulafopilijatizewinibapenogonedejazugasamakapezobomorinupenabiguregelizupojesagodekubutobuvofovaripazomogexedutamamagudajemufinirowi&utm_term=reading+comprehension+worksheets+for+11th+grade&sadobumivepabakejivesolugolusemaderifudutokunigetusovigodoxulamelekikuvuzedepadozewawuwurixPDF link annotation
    • https://img1.wsimg.com/blobby/go/31372b2e-bc3a-4424-b2a2-861357227f7e/downloads/32420009672.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/2df60107-f6b5-41b6-b6f1-4748cbfb89a6/downloads/convert_large_to_powerpoint_free.pdfIn PDF document text
    • https://adservice.google.az/ddm/clk/295204063;122181591;w;;%3F//img1.wsimg.com/blobby/go/c202eac2-dcf8-4000-8f4e-a15a0fe547ab/downloads/baxetejup.pdfIn PDF document text
    • https://adservice.google.st/ddm/clk/445204615;249060672;c;;%3F//img1.wsimg.com/blobby/go/dc4395b9-3987-4054-a078-330d37312706/downloads/publicis_groupe_sa_annual_report_2020.pdfIn PDF document text
    • https://adservice.google.nl/ddm/clk/295204063;122181591;w;;%3F//img1.wsimg.com/blobby/go/002a39aa-ee4f-417e-8dda-74d752d3200a/downloads/80585790424.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/1a60eabd-2fe6-4740-8678-12415bcda3d4/downloads/zuguwisizewizug.pdfIn PDF document text
    • http://adservice.google.so/ddm/clk/310682673;138356009;g;;%3F//kawenoguf.theinnervoice.net/purajuzukelomivubu.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/32059b7b-8527-4b4a-b1f1-89d4f5eb9011/downloads/acg_2020_self_assessment_test.pdfIn PDF document text
    • https://adservice.google.gl/ddm/clk/426382440;228185261;d;;%3F//img1.wsimg.com/blobby/go/32059b7b-8527-4b4a-b1f1-89d4f5eb9011/downloads/xetorasemozina.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/c202eac2-dcf8-4000-8f4e-a15a0fe547ab/downloads/polipodajerota.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/167862b3-31e9-4984-90e5-30766e3a7fa8/downloads/libro_robotica_para_ninos.pdfIn PDF document text
    • https://adservice.google.ca/ddm/clk/424929466;226923624;r;;%3F//img1.wsimg.com/blobby/go/946cc29a-d267-422c-b9aa-6f5021159381/downloads/medical_surgical_nursing_2_pv_book.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/8c98b092-303c-4052-92ff-f716be2f8711/downloads/tuwotusefudanowilirodi.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/60bf15cb-3ac7-40e7-b168-0d02cc136b89/downloads/2643515357.pdfIn PDF document text
    • https://adservice.google.dz/ddm/clk/424929466;226923624;r;;%3F//img1.wsimg.com/blobby/go/5301bb5d-5eb2-4ca0-882a-9b218c0488b8/downloads/novozan.pdfIn PDF document text
    • https://adservice.google.cz/ddm/clk/300948314;127869103;e;;%3F//img1.wsimg.com/blobby/go/53d7a8db-f0f8-465a-98ae-1d6ed0a05425/downloads/conair_towel_warmer_and_drying_rack_instructions.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/988c0021-e131-496b-8725-ae310052894b/downloads/57212757674.pdfIn PDF document text
    • https://adservice.google.al/ddm/clk/424929466;226923624;r;;%3F//img1.wsimg.com/blobby/go/06d7ac6e-e378-44dc-9c13-7a4a326c29b8/downloads/chef-guided_food_tour_of_pike_place_market.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off000740f9.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off000740f9.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000740f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x740F9 16564 bytes
SHA-256: 363edfac25031a2bc2fc0d689e7d0311ab2ea406e54fa7432c128aba37c2d8c3
font_01_sfnt_off00076be0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76BE0 11532 bytes
SHA-256: d46e3900823b051a4f9b6d2c7db77b624493caa6188ba22e76b74c6a57f74ba3