Malicious PDF — malware analysis report

Static analysis result for SHA-256 62f8438386ce8137…

MALICIOUS

PDF

63.5 KB Created: 2020-12-29 23:57:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfe7c72c05fe4843ad10c4e13207b247 SHA-1: a98ccfb25233b03d7dbb3f321572bead66f73c6e SHA-256: 62f8438386ce81373170e5e0fa6b96c3d2c32bf9e4365b5da30a42e1b741777a
212 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with one heuristic specifically identifying a link to known malicious redirector infrastructure. Another heuristic indicates a link farm, suggesting an attempt to generate traffic or distribute further malicious content. The ML classifier and ClamAV detection strongly support a malicious classification, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7842

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://cctraff.ru/strik?utm_term=phoenix+arizona+newspaper+classifieds
    • https://pazudafodimaje.weebly.com/uploads/1/3/0/7/130776249/9661396.pdf
    • https://cdn.sqhk.co/birenejar/jjhdpgj/ivry_lane_surgery.pdf
    • https://guzifako.weebly.com/uploads/1/3/4/0/134096492/256651.pdf
    • https://cdn.sqhk.co/devurekon/iQtq4jj/napipuj.pdf
    • https://fogowedosetoz.weebly.com/uploads/1/3/4/7/134703805/femede-dugibivikufel-jetiz-jaxemumato.pdf
    • https://static.s123-cdn-static.com/uploads/4384817/normal_5fe2177c0a39f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/levumoduf/lawipisivifakavo.pdf
    • https://s3.amazonaws.com/vokeri/sutixeviroxokivuvex.pdf
    • https://s3.amazonaws.com/lunojol/85985908108.pdf
    • https://uploads.strikinglycdn.com/files/4b35869d-ec33-4f35-9b3e-b7fab1e38812/nabimajivugomuk.pdf
    • https://s3.amazonaws.com/bupesejirijejus/alder_lake_wi_fishing_report.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec2f.bin
829e88499e3eebb1041d7f51effc75602700bfcc0a07e3c16103289e13fe1abb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2F 5160 bytes

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