Malicious PDF — malware analysis report

Static analysis result for SHA-256 13df75243d3b6f07…

MALICIOUS

PDF

63.4 KB Created: 2020-12-23 04:12:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8a90a719c70fea181021ac804d26504c SHA-1: dd518664112e03ea1321c59b2ecbcead52682ab5 SHA-256: 13df75243d3b6f072e3f8e6a60e58596cb2ed1ad71bb3f0927493b8bcf0a7554
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/strik?utm_term=blockposter+kleurplaat+herfst In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383579/normal_5fa1044d9a4af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370063/normal_5f8832d88bc1b.pdfIn PDF document text
    • https://toxovapuwelubu.weebly.com/uploads/1/3/4/7/134733969/b3a0e1a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499300/normal_5fe1f2c0f0eb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385413/normal_5fa7d56ac0cc8.pdfIn PDF document text
    • https://donodofi.weebly.com/uploads/1/3/1/8/131856097/3870670.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479707/normal_5fdd326fae835.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/betimugi/13021350219.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/canon_eos_elan_7e_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/transformers_autobot_city_toy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a7f322d-e7bf-4bb0-a9a8-787c4082f17b/vilivuvufevunedifowo.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_off0000b9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9A4 5216 bytes
SHA-256: d8865652b09f5c75931ed9655aeaf77639c8740d457d3b4830a149d91786c0a8
font_01_sfnt_off0000cb66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB66 11136 bytes
SHA-256: c2704e9da0c60412e88d8af60e83c3f0f0f7856e520b1818f24e0196b1765e81