Malicious PDF — malware analysis report

Static analysis result for SHA-256 010ea6ea6db5689d…

MALICIOUS

PDF

78.2 KB Created: 2021-03-28 22:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 65333fecba55c113b78a27d7b10ea2e7 SHA-1: e5be3c11aa7a2aedb983dc38aa686ef60e85bd5e SHA-256: 010ea6ea6db5689df8c4c97679b478723f5f0814d3312f18369958d16fb95ab4
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jumiwimov.ru/strik?utm_term=bissell+proheat+2x+pet+carpet+cleaner+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482207/normal_6032ca6bdafbe.pdfIn PDF document text
    • http://whalesqpa.fun/vozodebufifejemtx85o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468531/normal_60045029db04c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451556/normal_6056d91cc725c.pdfIn PDF document text
    • http://cardio-active.site/westminster_chiming_clocks_for_sale_ukalp5s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376359/normal_5ff4efdcde588.pdfIn PDF document text
    • http://hrushch.space/massey_165_hydraulic_pump_removalei0ru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ralirajuz.atwebpages.com/ronco_showtime_rotisserie_4000_white.pdfIn PDF document text
    • https://7f1158f2-e44e-4cac-991a-806210d1dc3e.filesusr.com/ugd/e4a8e1_7959b854fe134ceb9d23929a88ee60ae.pdf?index=trueIn PDF document text
    • https://d0275d90-c5b4-4c72-b581-d0e2b62fc6dd.filesusr.com/ugd/ee54da_c6853c833446425dbc5c90443928ec89.pdf?index=trueIn PDF document text
    • https://7e073981-ad1c-4081-8dc0-76946ba36063.filesusr.com/ugd/c4f63d_f2c14539b64c4e27b58770c62e0debb3.pdf?index=trueIn PDF document text
    • https://c779a0a5-5a96-4308-8c37-720837e0bdd2.filesusr.com/ugd/4f1d02_b4cd51c4f6da4364a1d579dd18c7fc42.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vavale/xobajumugatasar.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/abbi_glines_under_the_lights.pdfIn PDF document text
    • https://a72b158e-cead-41d6-a0b3-8518216316a4.filesusr.com/ugd/35c6e2_caf36a0d7da746ca91e7d34a3e437fea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rumezo/ladatatefo.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/zimojibitifabirotero.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/ps_i_still_love_you_book_soundtrack.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_off0000f301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF301 5424 bytes
SHA-256: 63143d2977460bcdb80b5836d1e246d55f5579a2305a6775b7222d498aa2a94f
font_01_sfnt_off0001054d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054D 11060 bytes
SHA-256: c93cea0525c4142b96f13c82cde65a1d26ffd1fcbd0808c841f15fbbe5e4f3be

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