Malicious PDF — malware analysis report

Static analysis result for SHA-256 865e7eafa193f94f…

MALICIOUS

PDF

76.0 KB Created: 2021-03-19 05:42:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0d8c9a82d6ff17775927371388900f58 SHA-1: a1195ffefd01c566f96d730693beb84bcc6fa116 SHA-256: 865e7eafa193f94f0f234ea227bdb53861946f19e2e2a77d57c355521b2e671d
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics as a link farm on disposable hosting. ClamAV detection and ML classification strongly indicate maliciousness, specifically a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'competition law pdf book'. No scripts were extracted, but the presence of external URIs and the overall detection profile suggest the PDF is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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://ponafet.ru/123?utm_term=competition+law+pdf+book PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368984/normal_5fc9d7110fb5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495694/normal_602a183077aa7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366402/normal_5fef732118c9a.pdfIn PDF document text
    • https://cdn.sqhk.co/nazabimon/c4jf4sr/charlie_movie_songs_in_starmusiq.pdfIn PDF document text
    • http://reawolt.online/xokebubuzoratoko0rcu8.pdfIn PDF document text
    • http://mosquito.codes/capitale_du_monde_apkadc98.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471099/normal_5ffe81d3612fe.pdfIn PDF document text
    • https://cdn.sqhk.co/peferitukofa/jgUkOC6/fuditogakeduw.pdfIn PDF document text
    • http://artrosil.xyz/algebra_1_10.1_worksheet_adding_and_subtracting_polynomials_answers_keylw4qm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446494/normal_5fc71c90e127b.pdfIn PDF document text
    • https://cdn.sqhk.co/tifesiwafo/cleOoij/counterfort_retaining_wall_design_excel_sheet.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/zofujizafenoa9nex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/dibezuwerotulogefetanit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/903cca1e-428e-4819-800b-86547a140a77/how_to_tell_what_size_furnace_filter_you_need.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b94893b-99e3-4e5d-bf1d-c59014bd5855/79478807338.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/457b49da-7ad9-4dea-80c0-a11db212955c/full_motion_tv_wall_mount_walmart_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76eb3b91-bbe9-4d05-99a2-75d7b42fa1d7/panasonic_toughbook_cf_53_cmos_battery_location.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/balancing_redox_reactions_practice_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00d39cc6-67d6-45d0-8395-3dc276df8634/83504278596.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/graphing_parabolas_equations_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57992c7d-955b-4011-b2aa-92c249ceb931/fazilulatuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47c2d636-5e4e-4a5a-9f4a-c18193ef8e89/jemegijemox.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F2 5116 bytes
SHA-256: 511b04d8fd5446a5201130af7d1a26c7567bd6c63bb00a7b6094888f27479d2f
font_01_sfnt_off0000f959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF959 11552 bytes
SHA-256: 474d99d2185a3a3b6cd28e5feb891113b2ecf788cc59e0539474c1023530bebe