Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fb4f98825018360…

MALICIOUS

PDF

32.3 KB Authoring application: pstoedit
MD5: fd0a75f2065a6b0a6b29116f0385766d SHA-1: f06d240b0a321ed646a92fb61fc0a829a5683f4a SHA-256: 3fb4f9882501836069e111752dfbec01e418b6f1a05075476479a287610f36fc
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of external links to other PDF files, a technique often used for SEO poisoning or to host malicious content. The document body attempts to disguise itself as a "Lego ideas book pdf" to trick users into clicking the links. ClamAV detected this as Pdf.Phishing.TtraffRobotInstall-7605656-0, and the ML classifier also flagged it with high confidence.

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://mountainclay.weebly.com/uploads/1/3/0/6/130621640/zexelikaneve.pdf
    • http://cancercure-fund.com/uploads/1/3/0/5/130551876/dikogizezazuwogax.pdf
    • http://maelabellydance.net/uploads/1/3/0/5/130551112/fd1d2abc3b9242.pdf
    • http://premierbv.com/uploads/1/3/0/7/130740062/7118524.pdf
    • http://netwerkpijnrevalidatie.com/uploads/1/3/0/3/130313178/88e9c6862.pdf
    • http://ccevenice.com/uploads/1/3/0/2/130291352/mikimuxizozopevew.pdf
    • http://misbailes.com/uploads/1/3/0/2/130289738/130289738.html#lego+ideas+book+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011cc.bin
2734a01ad261d7faa7c4c6a3e92a912880e28fc0f25b57dd81c8278fb4a9c8fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC 10520 bytes

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