Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd8ae042bca4b50e…

MALICIOUS

PDF

23.2 KB Created: 2020-04-16 02:57:22 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 51fd7972a61dca71f376c5f595a00665 SHA-1: 006b81f82919d159edc47935932bd63508040e4c SHA-256: bd8ae042bca4b50eddefb17da22fbb20e1852f4f6cf1f2da2cd91240866dfada
62 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1071.001 Web Protocols

The PDF file contains a large number of external links, many of which are numerically or generically named and point to domains that appear to be part of a link farm. One of the embedded URIs, http://kirkieg.com/uploads/1/3/0/6/130622049/130622049.html#nova+deadliest+earthquakes+worksheet, suggests a lure to disguise the malicious intent. The heuristic PDF_SEO_LINK_FARM indicates a deliberate attempt to create a large number of SEO-optimized links, likely for traffic manipulation or malware distribution.

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://kirkieg.com/uploads/1/3/0/6/130622049/130622049.html#nova+deadliest+earthquakes+worksheet
    • http://kaynakakademisi.com/uploads/1/3/0/5/130588928/8550058.pdf
    • http://linguaafinada.com/uploads/1/3/0/6/130604136/8865e79d87e.pdf
    • http://andreabauchowitz.com/uploads/1/3/0/7/130775868/weborilumilaponur.pdf
    • http://legrandphysiotherapy.com/uploads/1/3/0/4/130435666/xigad.pdf
    • http://kfitusaworkouts.com/uploads/1/3/0/7/130739060/belotezakulot-duwatupil.pdf
    • http://nicoletrottaphotography.com/uploads/1/3/0/7/130775668/zupituvosu.pdf
    • http://karenberlinmd.com/uploads/1/3/0/2/130272282/25745009149f.pdf
    • http://ajauchinger.org/uploads/1/3/1/3/131380121/02324.pdf

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