Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf6fb0c5228372c7…

MALICIOUS

PDF

51.6 KB Created: 2020-12-24 04:29:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d710e5f3171ebafe7f23da3d468f8ce2 SHA-1: 6d42401352deb8aeb3f1874fe238b270a58708da SHA-256: cf6fb0c5228372c7a01651c19ca251bd7ffa738d3a8ee4a3517c6024fc36a131
212 Risk Score

Malware Insights

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

This PDF file exhibits malicious behavior by acting as a link farm, directing users to potentially harmful websites. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates a direct link to a known malicious redirector, and 'PDF_SEO_LINK_FARM' highlights the creation of numerous external links, likely for SEO manipulation or to distribute malware. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8252

Heuristics 4

  • 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 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=tribal+wars+stats+pt
    • https://doxejukunalizep.weebly.com/uploads/1/3/4/8/134889306/70c12c.pdf
    • https://tavadubamik.weebly.com/uploads/1/3/4/4/134473349/b766b9f2079.pdf
    • https://sewobefavewekog.weebly.com/uploads/1/3/4/3/134367647/sarasobobe-wadirimola-mewurifopejole-dajop.pdf
    • https://cdn.sqhk.co/xakawituk/3WFijvL/lekidogefogemi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bb1758ff-72d3-486d-b0be-918e473f812c/megalovania_online_piano.pdf
    • https://s3.amazonaws.com/jeworurowam/316897342.pdf
    • https://uploads.strikinglycdn.com/files/4b025871-78ce-45fb-8734-4a73c1e5a79d/dragon_ball_character_creator.pdf
    • https://uploads.strikinglycdn.com/files/420882b3-8afc-4b28-931f-46a581b05215/best_race_for_monk_bfa.pdf
    • https://uploads.strikinglycdn.com/files/77350cbe-697d-43f1-a580-22b6b1534aa7/93347519828.pdf
    • https://uploads.strikinglycdn.com/files/7f3f3f3a-526b-4bf4-b520-48db433a8103/wibolajavomeziwakafare.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c15d.bin
a38ff41f503ae2e33254d8d3d46ddaeca12b5e081a1a41af6422a585cf6abff7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC15D 4992 bytes

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