Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f730c2d64d36417…

MALICIOUS

PDF

35.9 KB Authoring application: PDFedit
MD5: 8b4e8414f413663e0cdbe2a3439134c3 SHA-1: 97d54983ccd3d9f466c67f8a7e0e760c2617074a SHA-256: 5f730c2d64d36417e1bfa04abbad5a38c1501bfb746db271710e584694233a11
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used to distribute malware or redirect users to phishing sites. ClamAV identified the file as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', and a machine learning classifier also flagged it as malicious. The document body, though partially corrupted, contains several URLs that are part of this link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://moldremovalballwin.com/uploads/1/3/0/3/130323568/warufexib.pdf
    • http://moadim.net/uploads/1/3/0/6/130621706/bifevulasaviwub-soxamisi.pdf
    • http://bordercollieevents.nl/uploads/1/3/0/5/130550971/846517.pdf
    • http://markevanier.net/uploads/1/3/0/4/130475909/567e7f9bcb3b.pdf
    • http://meredithbirrell.com/uploads/1/3/0/5/130545333/130545333.html#blender+ambient+occlusion+node

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001075.bin
32a0db02b886c732ce211d376541698abcc6ac15032a664144927b9c5a2baf22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1075 9104 bytes

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