Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6e25d4b53b18c37…

MALICIOUS

PDF

76.2 KB Created: 2021-01-05 16:16:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2657d409b7325b7c23c9f6d326e81da3 SHA-1: 768e26eec2a5199a56e2e92c5daf8da5c49b2f1c SHA-256: d6e25d4b53b18c37385bb8ae9a761483ed75828b9785fb3f5c4d68d4f048be54
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF document was flagged by multiple heuristics, including ML classification and ClamAV, as malicious. It contains numerous embedded URLs, many of which are hosted on disposable domains or link farms, suggesting a phishing or credential harvesting attempt. The 'SE_MFA_LURE' heuristic indicates the document likely attempts to trick users into providing one-time codes or MFA approvals, consistent with session token theft.

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://trafficel.ru/123?utm_term=mediflow+waterbase+pillow+target PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4474985/normal_5fe4299d19cea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4506170/normal_5feeb6af77f5a.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/jgfjaiC/pakajosomuwejewerutowur.pdfIn PDF document text
    • https://dubuzimonovox.weebly.com/uploads/1/3/4/3/134347386/79cda6af.pdfIn PDF document text
    • https://cdn.sqhk.co/zururodi/IhhgcZZ/the_adventure_girls.pdfIn PDF document text
    • https://nopefoxanav.weebly.com/uploads/1/3/2/6/132696012/popovuxujuwapot_jojalomiz.pdfIn PDF document text
    • https://viwosakizipisot.weebly.com/uploads/1/3/5/3/135321869/2785515.pdfIn PDF document text
    • https://kodowogokilikid.weebly.com/uploads/1/3/4/4/134466607/9317547.pdfIn PDF document text
    • https://cdn.sqhk.co/fukafodifi/gfy7gia/24889070160.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481841/normal_5fac3b03161cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410975/normal_5fd8229853dae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374980/normal_5f897f6d471bc.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutorixo/K2sZjcU/blast_beat_movie_kali_uchis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f59a443f-d4aa-4107-b87a-efe686de7f64/rutezem.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B6 5448 bytes
SHA-256: 721bd8364a5d5069ed8f169802bbeca7174fc34ea726ad055a6c90fd8484a958
font_01_sfnt_off0000e867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE867 10740 bytes
SHA-256: 160be0ff4a284972a1a43f4c5142af61858744343228f4ce3401640595134bfd
font_02_sfnt_off00010d63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D63 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2

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