Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d00192786ad27e0…

MALICIOUS

PDF

67.1 KB Created: 2021-01-17 13:53:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 90497956e2d5f58140c375bf83a1f940 SHA-1: 7da28e572a21ce159180d68da0a8352f888815d3 SHA-256: 7d00192786ad27e01313f97bf9a86db59fe783706d3a9e81496c43776f348d2b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The ML classifier and ClamAV detection strongly indicate this PDF is malicious. The PDF contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to redirect users to a network of potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/aws?utm_term=burger+3d+model PDF link annotation
    • https://cdn.sqhk.co/noperizapewo/djbghye/safasijobamuvitemavosiwo.pdfIn PDF document text
    • https://cdn.sqhk.co/doxowite/gb6hhcl/general_hospital_nelle_falls.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/d9v6zZW/suxapinedizogasoveruvolu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408881/normal_5faa5603863f6.pdfIn PDF document text
    • https://cdn.sqhk.co/xijogedobu/e7VTlml/shell_clubsmart_login.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474205/normal_5fbc7d48ea4f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490375/normal_5fee29c2e0581.pdfIn PDF document text
    • http://wowezixuxaxu.22web.org/rarotoseneki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403560/normal_5faac0c658dd8.pdfIn PDF document text
    • https://cdn.sqhk.co/jevipugirofi/RLHW0qQ/best_air_traffic_control_game_ipad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369932/normal_5f8d32494bdcf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nozaleb.rf.gd/amazing_grace_piano_sheet_music_difficult.pdfIn PDF document text
    • http://dojopugoput.epizy.com/69382016568.pdfIn PDF document text
    • http://luselobek.epizy.com/exercises_on_past_tenses_with_answers.pdfIn PDF document text
    • http://newurefaz.epizy.com/sundara_kandam_telugu.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_off0000ca17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA17 4972 bytes
SHA-256: 83e3f3ad8ca8fad9244525e3f5609464cf6e42a70c6e2ba79c8ada2b40e405bb
font_01_sfnt_off0000daee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEE 10820 bytes
SHA-256: 1276dbe31196b3cdbe7af3b2fa0a406b511ef310e900b6a686819a989de9d9ca

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