Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b062a3afa0ef052…

MALICIOUS

PDF

96.9 KB Created: 2021-03-16 20:24:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0a48cb2a3fa128ea274401c1f42281c7 SHA-1: c47e6df1be7f08ffdd8c03a8a5ba7b141053a278 SHA-256: 0b062a3afa0ef0529fa1ee045c1368debee5c8b818a0e7fb3552c49dc0cf548c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external URIs pointing to disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious workflow aimed at tricking users into downloading further content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9889

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/award?keyword=bhagavad+gita+full+book+pdf+download PDF link annotation
    • https://nejavedejelije.weebly.com/uploads/1/3/4/3/134336697/4063473.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477620/normal_5ff437b009ae3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412592/normal_6016fa4c9fce6.pdfIn PDF document text
    • https://mufanujirube.weebly.com/uploads/1/3/5/3/135348440/828ac1.pdfIn PDF document text
    • http://misujupino.getenjoyment.net/general_aptitude_test_questions_and_answers_for_gate.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/80823988966.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413225/normal_603000fc86f08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405660/normal_601fef69a021e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426679/normal_5fcbbeacbb7a2.pdfIn PDF document text
    • http://wugigazugijub.22web.org/86571755662.pdfIn PDF document text
    • https://tikivumisa.weebly.com/uploads/1/3/5/3/135346314/68c5dc8c851602.pdfIn PDF document text
    • http://zitosuganenat.medianewsonline.com/atm_card_application_form.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/ukulele_fingerpicking_exercises.pdfIn PDF document text
    • http://dupomixu.iblogger.org/sitonowapozelozegu.pdfIn PDF document text
    • https://febamepu.weebly.com/uploads/1/3/1/0/131070604/givomilogogezam.pdfIn PDF document text
    • http://gekodejevotug.medianewsonline.com/ed_rosenthal_zero_tolerance_fungicide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3c04ec1-d728-41ce-902d-bd6f1fbb7f54/general_purpose_vs_specific_purpose_vs_central_idea.pdfIn PDF document text
    • http://javisan.epizy.com/kixenirezuvotid.pdfIn PDF document text
    • http://fubavinexazixo.onlinewebshop.net/odd_thomas_dean_koontz_series.pdfIn PDF document text
    • http://zisukuvi.atwebpages.com/traductor_espaol_ingles_audio_gratis.pdfIn PDF document text
    • http://lugukejuraxa.rf.gd/audio_drivers_windows_10_download_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ed001e0-6e10-4933-ae5e-a950de0342f3/free_printable_blank_hundreds_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3585ef6b-6bfd-4fcf-ae5e-3029ddb24459/zifedopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8857347-9091-44d5-b8dc-8e65922380b9/how_to_subscribe_with_twitch_prime_on_ipad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f151a2b-c9a5-41ba-9668-4751ba57a866/toro_lawn_mower_recycler_6.5_hp_self_propelled_manual.pdfIn PDF document text
    • http://povodakav.myartsonline.com/61809731919.pdfIn PDF document text
    • http://sukasorepej.rf.gd/pimudogurukenoki.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://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94B 5432 bytes
SHA-256: 8e176c922bcc6932816779d0ba5dfb6a11554552a59b211eef2f02a8a630fc22
font_01_sfnt_off00010bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDF 3720 bytes
SHA-256: 40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
font_02_sfnt_off00011741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11741 11024 bytes
SHA-256: 9ae90c0128f22cbef0fb162d6f665a0bd5a71e4d0c4bb30d911694192dde5cea
font_03_sfnt_off00013cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CDD 16172 bytes
SHA-256: 96e06106e3006553386fba87c243c4a28b622411f61b38071404873282de63a9
font_04_sfnt_off00015235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15235 10308 bytes
SHA-256: 18332ea6ece60ce54763b09a96101e099e4f6a7e0c8ae82d30dc27b21512bf97