Malicious PDF — malware analysis report

Static analysis result for SHA-256 c299a5474ed607af…

MALICIOUS

PDF

37.8 KB Authoring application: LibreOffice
MD5: 12140396b16114a04db9d18f23a28cf5 SHA-1: 90d417572996d8ae4196a85d73644dcd11431109 SHA-256: c299a5474ed607afe62f844e6353cdd3638f4f2a62d2b932c6ae1062e4e50fa8
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique commonly used for SEO poisoning and phishing. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The document body, though heavily corrupted, contains references to a 'Boden shoe sizing guide' and includes URLs that are likely part of a link farm designed to distribute further malicious content.

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://diablopepperfarm.com/uploads/1/3/0/6/130604185/af3fcbb93d2f30.pdf
    • http://prenotalapizza.com/uploads/1/3/0/2/130270783/miluxu.pdf
    • https://xedoxevenilover.weebly.com/uploads/1/3/0/4/130483368/3961e.pdf
    • https://dedegitusorimep.weebly.com/uploads/1/3/0/5/130545485/tudeg.pdf
    • http://ring-lamp.ru/uploads/2020/01/29/7628011.pdf
    • http://showskazka.ru/uploads/2020/01/27/5672835.pdf
    • http://linkedthruleonard.com/uploads/1/3/0/4/130435781/1b30c0.pdf
    • http://womeninedresearch.weebly.com/uploads/1/3/0/6/130639404/940a1.pdf
    • http://thswebpages.org/uploads/1/3/0/6/130603841/1594887.pdf
    • http://narellecridland.com/uploads/1/3/0/3/130312993/130312993.html#boden+shoe+sizing+guide

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011ae.bin
4ee7ae7742220195b63532d42484dbb92878d53d93217fc99e2fef9d1fe20c63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE 8504 bytes

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