Malicious PDF — malware analysis report

Static analysis result for SHA-256 c46fb0df8120266f…

MALICIOUS

PDF

61.4 KB Created: 2020-11-27 12:47:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 1b03aa34c4bee2fc0a933a9ce6b9aaba SHA-1: 269f953cafb15850c75a43067125e693501745be SHA-256: c46fb0df8120266f081a58108e270834c9d4970f2c352d79db4036f09aa5aeb0
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://traffine.ru/strik?utm_term=silver+the+hedgehog+game+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370052/normal_5f8862aa5809d.pdfIn PDF document text
    • https://rovifubejoros.weebly.com/uploads/1/3/4/4/134432010/c2d2293.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5fbf08572fb8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470408/normal_5fa3bb71e63ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476135/normal_5fbc8eab98928.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404745/normal_5f9789ece8f8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369516/normal_5f9c18111bfa1.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/sisaxu/xizerin.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/1v1_just_build_simulator.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/jujerikefolidanikujotiwig.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/basawuk.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/3018875642.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_off0000b608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB608 5224 bytes
SHA-256: 17ccecd76431614728e9df56b3a754795771921bfda1674dc717891e0bf1c051
font_01_sfnt_off0000c7a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A3 9836 bytes
SHA-256: e4a01687938dded586d74c72885f4851f91563c8624d62318dbb29a3947f683b