Malicious PDF — malware analysis report

Static analysis result for SHA-256 2981e41e6adfb8c0…

MALICIOUS

PDF

77.4 KB Created: 2021-01-10 03:28:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 85681e2f4d71ed89791f8b1d22dfcee1 SHA-1: 090755d811ce517f2ff16edb0a1d7a3acb46e9e8 SHA-256: 2981e41e6adfb8c07426763b5343a9afdc19736809595d4c6de92bbea721ec70
204 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for a link to known malicious redirector infrastructure. The document contains embedded URLs that lead to disposable hosting, suggesting a link farm or phishing attempt. The presence of these links and the overall classification indicate a likely attempt to redirect users to malicious sites for further compromise.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://gettraff.ru/123?utm_term=le+matin.ch+petites+annonces In PDF document text
    • https://site-1180682.mozfiles.com/files/1180682/vigulurikenivusa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_5fb38021c4a01.pdfIn PDF document text
    • https://site-1218469.mozfiles.com/files/1218469/balancing_chemical_equations_homework_sheet_answer_key.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413719/normal_5fc2b71689253.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459164/normal_5fb9edfe126fe.pdfIn PDF document text
    • https://site-1239447.mozfiles.com/files/1239447/degos_disease_case_report.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzonabudad/TqIB6P1/lisor.pdfIn PDF document text
    • https://site-1232909.mozfiles.com/files/1232909/roraluvidikoturodikinu.pdfIn PDF document text
    • https://site-1168078.mozfiles.com/files/1168078/46688563516.pdfIn PDF document text
    • https://site-1176856.mozfiles.com/files/1176856/tesejovoti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403410/normal_5fb4d25646db2.pdfIn PDF document text
    • https://site-1171686.mozfiles.com/files/1171686/33483301644.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gezizefefififa/26905926111.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EC 4804 bytes
SHA-256: 644919aa04e28d398c87c1c03b3341e7d5133a9df04a9fb15121124c0dc6669d
font_01_sfnt_off0000f10b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10B 12880 bytes
SHA-256: b85d25c6c179b88b72916ae879154f9c7d654b2b6e8e0ee6089c3ca376e251d1
font_02_sfnt_off00011965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11965 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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