Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 8a9e1e41a4685cf7…

MALICIOUS

PDF / .VIR

374.1 KB Created: 2023-09-28 20:44:02 Authoring application: GIMP First seen: 2024-04-14
MD5: 70ea28bee814d3c426095ba2dfefb9bb SHA-1: feef213418d93d33372188a29005fa2283bbf279 SHA-256: 8a9e1e41a4685cf75989d54c7e5f3a6774a2c4042de3c235e21f753592418ba3
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9782

Heuristics 7

  • 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.
  • 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 https://adservice.google.co.cr/ddm/clk/408533097;208818505;l;;%3F//img1.wsimg.com/blobby/go/0f3f56ba-5d04-46d2-9932-7e57f099b9e1/downloads/reinforced_concrete_design_8th_edition_solution_manual.pdf In PDF document text
    • https://adservice.google.com.py/ddm/clk/295204063;122181591;w;;%3F//img1.wsimg.com/blobby/go/c2808bc6-f014-4e13-bda9-fb9fed72d2f8/downloads/bevatafilekuxamig.pdfIn PDF document text
    • https://adservice.google.com.co/ddm/clk/295204063;122181591;w;;%3F//limiwadiv.yaguecf.com/609.pdfIn PDF document text
    • https://dofotetadover.mofien.co.za/278775120384215221?keronofamilaxunerazururifosapixezisadevolemidakagawuxabotemuxi=rifedoduwaratugovuxitijefobujevowenojaguketenunadukesaxipuletunevumebupikokuwijumubipagamigaxokurusokerenifiledufipujusozovunefazixodesurufexusorabibutaxexurewasegalusudokikajexotetewepafigariwefokejid&utm_term=dual+app+wizard+old+version+apk&bigowiwamevabexifimonotabix=xupedejovudabolekezefozifalexusovejetarajijojeridolesikurusalobipepoduwafipakikovuwewopokajojozutitepubupotizerofevimivifovigovuIn PDF document text
    • https://dofotetadover.mofien.co.za/278775120384215221?keronofamilaxunerazururifosapixezisadevolemidakagawuxabotemuxi=rifedoduwaratugovuxitijefobujevowenojaguketenunadukesaxipuletunevumebupikokuwijumubipagamigaxokurusokerenifiledufipujusozovunefazixodesurufexusorabibutaxexurewasegalusudokikajexotetewPDF link annotation
    • https://dofotetadover.mofien.co.za/278775120384215221?keronofamilaxunerazururifosapixezisadevolemidakagawuxabotemuxi=rifedoduwaratugovuxitijefobujevowenojaguketenunadukesaxipuletunevumebupikokuwijumubipagamigaxokurusokerenifiledufipujusozovunefazixodesurufexusorabibutaxexurewasegalusudokikajexotetewepafigariwefokejid&utm_term=dual+app+wizard+old+version+apk&bigowiwamevabexifimonotabix=xupedejovudabolekezefozifalexusovejetarajijojeridolesikurusalobipepoduwafipakikovuwewopokajojozutitepubupotizeroPDF link annotation
    • https://img1.wsimg.com/blobby/go/63dccf72-7be1-4876-b73a-9f2ad68d69e8/downloads/jupamum.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/74fc1813-6173-4e1c-baaa-0a8f87fd5bb9/downloads/83619132025.pdfIn PDF document text
    • https://adservice.google.hu/ddm/clk/466651624;272226156;i;;%3F//img1.wsimg.com/blobby/go/c03b7db8-dd12-4ea2-bf1d-fdf9f233f72e/downloads/download_aplikasi_nitro_for_pc.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/30ffbd7a-916e-41c0-b53c-a5025b81aa92/downloads/dramatical_murders_game_for_android.pdfIn PDF document text
    • https://adservice.google.dk/ddm/clk/448794861;252804937;a;;%3F//img1.wsimg.com/blobby/go/37368a6d-e6b7-4832-a089-9674425c8f97/downloads/chrono_trigger_side_quests_guide.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/d374946c-d111-4d23-a00d-4d9e84a6499f/downloads/think_and_grow_rich_review.pdfIn PDF document text
    • https://adservice.google.me/ddm/clk/295204063;122181591;w;;%3F//puraxasaru.globalpharmatimes.com/vulawek.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/cb247fed-e30a-4aff-93c4-d4c2fd8b7b75/downloads/739551947.pdfIn PDF document text
    • https://adservice.google.ga/ddm/clk/425484003;227454619;f;;%3F//img1.wsimg.com/blobby/go/25bf047a-3487-41e6-9cb9-e6197839db06/downloads/76874595940.pdfIn PDF document text
    • https://adservice.google.tg/ddm/clk/426382440;228185261;d;;%3F//img1.wsimg.com/blobby/go/6ff5ae6b-4883-4490-b1ad-57aedafeff52/downloads/run_android_emulator_docker.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/f636bb18-c15e-45f1-9c95-10478ab68775/downloads/lucio_vilar_endocrinologia.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/db1a1040-03ab-48b3-b1c6-c1c08d279976/downloads/74342133243.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_off000588f4.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off000588f4.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000588f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x588F4 15808 bytes
SHA-256: 9cc652b2b6680bc2dd8b88c27d01e133f040e4059aa687012fd67de9927efa43
font_01_sfnt_off0005b1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B1A8 10512 bytes
SHA-256: fd863f12c78e100ede41a7560eecab3d005582f54d7854ccf41f000d44fce5e0