Malicious PDF — malware analysis report

Static analysis result for SHA-256 b91b3d168dd16069…

MALICIOUS

PDF

34.8 KB Authoring application: Solid Converter PDF
MD5: f39093dd30cf3a42aa85621623a5fc66 SHA-1: e3414f66bffed2a72affbf0fd0cb5b59dfaaf28d SHA-256: b91b3d168dd16069c689285c752fc27be5f74b2aa113175d1d8ae8f6998553df
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO spam or to direct users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs are the primary indicators of compromise, likely leading to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://eddiecastle.com/uploads/1/3/0/6/130605065/tunubezenizen.pdf
    • http://rosholtcorp.com/uploads/1/3/0/7/130740097/suxobofidepe.pdf
    • http://randrcantina.com/uploads/1/3/0/7/130739341/6194642.pdf
    • http://juliejesternewman.com/uploads/1/3/0/7/130739218/130739218.html#chronic+calculous+cholecystitis+medscape

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00000f7b.bin
7e6bdee59c108d9fd35fb16a1858cddebbc992916501082ea0c77b3c4bb56131		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B 8112 bytes

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