Malicious PDF — malware analysis report

Static analysis result for SHA-256 224ab907a199f3db…

MALICIOUS

PDF

39.1 KB Authoring application: pstoedit
MD5: f6ae4f72a8e0a60d0eaf4094be039525 SHA-1: a7b9096c20eeb136f2c1070d5c6b6582899d13fe SHA-256: 224ab907a199f3db1f07110072d2dfee84c67bda456505d8613cf3ab0967e13f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The PDF_SEO_LINK_FARM heuristic fired, revealing a large number of external links embedded within the document. These links likely serve to redirect users to potentially harmful websites or for SEO manipulation purposes. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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 http://m.geoffgoodsonhorsemanship.com/uploads/1/3/0/4/130483912/wuligusetegu-xogaso.pdf
    • http://downtownsenecasc.com/uploads/1/3/0/6/130621959/812694.pdf
    • http://bienvenufosterryanobannonlawllc.com/uploads/1/3/0/2/130289763/sokibuxizizazimemod.pdf
    • http://woodlandelementarycoachhughes.com/uploads/1/3/0/4/130488513/538b212bf9.pdf
    • http://ktosvoboden.com/uploads/2020/01/28/5496238.pdf
    • http://kad.russtin.com/uploads/2020/01/28/fekawuku-moxuruve-bakogex.pdf
    • http://allamericandogexpo.com/uploads/1/3/0/2/130273626/130273626.html#bench+press+exercise+video

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010df.bin
25402c8945e8f5609fe581ce91b726d1dbed87be06c537bf4c4781d007d117ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF 7612 bytes

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