Malicious PDF — malware analysis report

Static analysis result for SHA-256 c03c32a99eacaeb5…

MALICIOUS

PDF

33.4 KB Created: 2020-06-16 22:41:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04a4d3a100c4b238fcc78317bb9c413b SHA-1: b102eab4163b45e8f1404a2461e3a66d7a01fc0e SHA-256: c03c32a99eacaeb5cff9e7862b09a875e410e3d60a743065b0674c3f1461d2b9
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links to domains that appear to be part of an SEO link farm. The ML classifier strongly indicated maliciousness. The primary purpose seems to be redirecting users to a network of pages, likely for advertising fraud, phishing, or malware distribution. 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.
  • 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://cpanel.townofhelvetia.com/uploads/1/3/0/5/130588702/130588702.html#pdf+to+png
    • http://h2blove.com/uploads/1/3/1/4/131453530/5d000.pdf
    • http://helimounts360.com/uploads/1/3/0/4/130435843/d3bf66a040243e.pdf
    • http://queereantown.com/uploads/1/3/0/7/130775645/5238050.pdf
    • http://lightupweightloss.com/uploads/1/3/0/6/130620736/0d9878e1.pdf
    • http://cutrightlawncare.net/uploads/1/3/1/4/131409167/fokasorese-nusemivuzidupe-laxekupedo.pdf
    • http://mail.teachenglishstepbystep.com/uploads/1/3/1/6/131637797/besizod.pdf
    • http://74-123-72-187.mgwnet.com/uploads/1/3/0/4/130476628/filotume_mitev.pdf
    • http://mail.store.wabashfriendscounseling.com/uploads/1/3/0/5/130589281/kavudagupulijeka.pdf
    • http://ebookscool.com/uploads/1/3/1/6/131636965/4432257.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046c7.bin
9dd22e593ec67749f9004ab430ddcda6e8e5832cd91587856a2a8a81f1b96963		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46C7 4316 bytes
font_01_sfnt_off00005575.bin
1278371be33d083fe124f038ed40990571f5a0d97463d753bdbd6f72442a5963		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5575 11212 bytes

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