Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9f170e3f5d74a3b…

MALICIOUS

PDF

38.7 KB Authoring application: pdf-parser
MD5: c77ea1450ace91a22779cdcc03b3f5da SHA-1: 2c3ed1be6e995b03978a43e59415b2ddcd26ab5f SHA-256: e9f170e3f5d74a3bc2b0bb9510ac94a9852f85752a4d300f6e1bce80c334156b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm used for SEO poisoning or phishing. The ClamAV detection and ML classifier further indicate malicious intent. The embedded URLs point to various PDF files and an HTML page, likely serving as lures or redirects to malicious content.

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://rfleasingga.com/uploads/1/3/0/4/130488736/9040670.pdf
    • http://neweaglerestaurants.weebly.com/uploads/1/3/0/4/130488616/zufekezomi.pdf
    • http://missoulaimports.com/uploads/1/3/0/5/130546294/pekadaribufudap.pdf
    • http://fractive.io/uploads/1/3/0/6/130620764/lozaxukoronitiwamole.pdf
    • http://sewakholding.com/uploads/1/3/0/5/130551341/46743c9eb.pdf
    • http://mysoundcollective.com/uploads/1/3/0/6/130640116/130640116.html#female+bodybuilding+workout+routine

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000107f.bin
4b0f0bfe6bdd61176afec911343c89a905cd2a690f12810369ed0df959519c29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107F 8404 bytes

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