Malicious PDF — malware analysis report

Static analysis result for SHA-256 b71dab3a438114e7…

MALICIOUS

PDF

34.9 KB Authoring application: OpenOffice.org
MD5: f8643e276956955798fa33737c63429d SHA-1: 2bb9d88b6fa797b35fd7cf48ee95bf3c10dcc1af SHA-256: b71dab3a438114e74199ae66efa0542538403144a5c9910d6e10b48c8df5725b
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also indicate maliciousness, specifically flagging it as phishing-related. The primary attack pattern involves directing users to a vast network of linked PDF documents, likely to distribute malware or engage in phishing activities. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://northdiamondcapital.ca/uploads/1/3/0/5/130544734/xejoferason_govafijif_kuwejuzixedu_dudixosipirotu.pdf
    • http://britmaritime.com/uploads/1/3/0/5/130589104/82b55cdcba.pdf
    • http://thetipsybrushchicago.com/uploads/1/3/0/5/130588343/6540f180d18e12.pdf
    • http://hong9yulechengdubo.f18.ebkf.org/uploads/1/3/0/5/130551059/lomuvilalutududisudo.pdf
    • http://mindregard.com/uploads/1/3/0/2/130289748/9476353.pdf
    • http://ppal.space/uploads/1/3/0/6/130620423/afea81e379cf8dd.pdf
    • http://mychildrendevelopment.com/uploads/1/3/0/7/130738889/dosibutew.pdf
    • http://camp720.com/uploads/1/3/0/2/130291441/2141327.pdf
    • http://pingrail.com/uploads/1/3/0/7/130738511/lavolelugo_monaku.pdf
    • http://jennycarroll.com/uploads/1/3/0/2/130291545/5423539.pdf
    • http://alternativemedicine24.com/uploads/1/3/0/2/130271015/1333208.pdf
    • http://www.onelittleindianphotography.ca/uploads/1/3/0/6/130620889/eab3b204a9.pdf
    • http://rollingoaksmemorialcenter.us/uploads/1/3/0/4/130483616/08bd3d24.pdf
    • http://x0226529xstreamtravel.xsideas.com/uploads/1/3/0/7/130739742/130739742.html#icd+10+code+for+chf+with+pulmonary+edema
    • http://alternativemedicine24.com/uploads/1/3/0/2/130271015/133320

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f44.bin
7aff36665298085b91781707956128db1da46c8f2687e9643fdd22b3ec7fc414		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F44 7956 bytes

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