Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d74247c931c7014…

MALICIOUS

PDF

69.7 KB Created: 2020-11-19 22:51:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ad11ffefc1acb4c3afd979ea4c020db0 SHA-1: 9712bae896d0c3c08f74e9decce016265738e735 SHA-256: 9d74247c931c7014e51300e2e75bbc8977bdf976b37fe784a1701d36e6e4107f
176 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically indicating a phishing or trojan threat. The 'SE_CALLBACK_LURE' heuristic strongly suggests a callback phishing or tech-support scam, where the user is prompted to call a number. While no scripts were extracted, the presence of numerous external links, including a link farm, indicates an attempt to redirect users to malicious content or exploit kits. The ML classifier output of 0.999726 further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://trafftec.ru/123?utm_term=rotmg+knight+maxing+guide PDF link annotation
    • https://surumovosutimu.weebly.com/uploads/1/3/4/7/134733284/fulal-fugukufumi-garexamotu.pdfIn PDF document text
    • https://rofuvawe.weebly.com/uploads/1/3/4/3/134363923/9cf5b45ae7421c.pdfIn PDF document text
    • https://dotelotud.weebly.com/uploads/1/3/4/6/134696787/cad80cb7df.pdfIn PDF document text
    • https://fenawivo.weebly.com/uploads/1/3/4/0/134000055/fararaguze.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/06d42e8b5bcad.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/wiwamoxamo/81284547674.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/ripilubozerevex.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/45514117278.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/25266598315.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/fazawunitevujovomajoneg.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/paxefemijamogemeli.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/sirekomababakimajesadi.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/bianca_yes_juliet_death_picture.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/23275105303.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_off0000d529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD529 5072 bytes
SHA-256: 25cee8a10d2ce2db35ebe4e0bd1abbefb3a20911556ad35f126a69262494a460
font_01_sfnt_off0000e64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64B 10592 bytes
SHA-256: 53d3299894528afcdebc840869088c95d9385c3d699b0a5217e142cca130f2da

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