Malicious PDF — malware analysis report

Static analysis result for SHA-256 59fe9d67c0e45414…

MALICIOUS

PDF

25.5 KB Created: 2020-04-22 03:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 056febd14ce6421a38172bfd9b5e6b6a SHA-1: 9b172598f07b5bc5c9c08ec2c9061529c4eb83b7 SHA-256: 59fe9d67c0e454141041c8d4a88bfc2e927a051e97446acdc0c1ab9290787578
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, a technique often used for SEO spam or to distribute further malicious content. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to URLs that are part of this link farm. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://ceremoniousgifts.com/uploads/1/3/0/4/130488312/130488312.html#full+size+bed+sheets+measurements
    • http://addiscakes.com/uploads/1/3/0/5/130539800/4593465.pdf
    • http://splinteredmindprints.com/uploads/1/3/0/4/130488175/mexasa_mixatulifuv_pefebelimut_dekirusodi.pdf
    • http://nerdygoatbotanicals.com/uploads/1/3/0/3/130323286/sifaxowula.pdf
    • http://thecolourcompany.ca/uploads/1/3/1/3/131398221/9371247.pdf
    • http://holehjan.com/uploads/1/3/0/5/130589270/4442703.pdf
    • http://lightharvestlithium.com/uploads/1/3/1/4/131408529/fopemovilo.pdf
    • http://1stclassmovingcarolinas.com/uploads/1/3/1/3/131380604/4423894.pdf
    • http://chiropracticpracticeforsale.com/uploads/1/3/0/9/130969330/bbe5c9abc8f2.pdf
    • http://upowerpro.com/uploads/1/3/0/6/130604601/ximiped.pdf
    • http://wudressing.com/uploads/1/3/0/7/130739827/8147193.pdf

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