Malicious PDF — malware analysis report

Static analysis result for SHA-256 a99fe714c9e98da5…

MALICIOUS

PDF

41.2 KB Created: 2020-04-01 13:20:24 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a2dbeefaa3f0eebb3c4b2298a56df7e4 SHA-1: 729cd7a89d699906a5142c3c9c6c03678cf2d5aa SHA-256: a99fe714c9e98da566f28be947ab3d040293bd9e0a72e3a8917d5222f58657ef
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF link farm' heuristic. The embedded URLs point to various domains, suggesting an attempt to manipulate search engine results or redirect users to potentially malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, limiting the analysis of direct payload delivery mechanisms.

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://purelinewellness.com/uploads/1/3/0/8/130814728/130814728.html#reparto+terapia+intensiva+in+inglese
    • http://bonnievig.com/uploads/1/3/1/0/131070983/5071937.pdf
    • http://jgmedianews.com/uploads/1/3/0/8/130814193/2245591.pdf
    • http://portillopartners.com/uploads/1/3/0/6/130621002/vijajoses.pdf
    • http://thesuburbangent.com/uploads/1/3/0/3/130323465/tufegalejupabexaxap.pdf
    • http://janobaltimore.com/uploads/1/3/0/5/130588658/f8f2cdc191d4f.pdf
    • http://mieswholesalemeats.com/uploads/1/3/0/5/130588744/manefugaxafa_nemupinepem.pdf
    • http://thecafeinthegym.com/uploads/1/3/0/9/130969442/vuwex-xenapukap-biwosujexu-tapixufoturi.pdf
    • http://labreaplaza.com/uploads/1/3/0/7/130740068/8770794.pdf
    • http://tuz-tirol.net/uploads/1/3/0/3/130379192/savitekivepijeg-rejija.pdf
    • http://no-drift.com/uploads/1/3/0/5/130539654/2635830.pdf
    • http://talkingaboutart.org/uploads/1/3/0/2/130272280/dedol.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000763c.bin
d51a9787cbc31ae8e4af8efc4cf812e69d435bab4a04482bf16e78511abbca38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x763C 8940 bytes

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