Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c9bffd380d6f7cf…

MALICIOUS

PDF

74.7 KB Authoring application: Pdftk
MD5: b59d285d0a8962637ecd73a5581db423 SHA-1: 40ce7491af4cfeddca1a94d2e59d4bdc3d6a28af SHA-256: 2c9bffd380d6f7cf8c8136bd4372ade83a8d6ef581f57cf6a0991574c89d56e8
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique commonly used for SEO poisoning and phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded links likely lead to further malicious content or phishing pages, serving as a lure to unsuspecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://saratogacornercafe.us/uploads/1/3/0/6/130621196/wewejujigeved-kavax-vokigamam.pdf
    • http://tp-tovar.website/uploads/1/3/0/3/130313179/e0bf71.pdf
    • http://tbkhoneyco.com/uploads/1/3/0/5/130590047/ef57382286.pdf
    • http://tjrothconstruction.com/uploads/1/3/0/4/130479513/kudazijenoneti.pdf
    • http://javapoba.fineremont.ru/uploads/2020/01/27/tezewoju.pdf
    • http://mykonosphotographer.com/uploads/1/3/0/7/130776346/xakujonodepar_mirirenirozul.pdf
    • http://allamericandogexpo.com/uploads/1/3/0/3/130313433/130313433.html#acc%2F+aha+heart+failure+guidelines+2019

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000121f.bin
1f02c7469ed071f217884db1d6dfdca56da19b1d62aaadb644ea02ea2efd1960		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121F 9176 bytes

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