Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea77245eaedceb95…

MALICIOUS

PDF

118.7 KB Created: 2020-03-30 12:47:24 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a3496994bb2f5bf90fad3d84e0bcf958 SHA-1: f323e3b0bd65d4c0f6b42dfd7371186b9aaad442 SHA-256: ea77245eaedceb95863e245ae275520c254797360c1b5ea007706f7fae4cb4bf
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO poisoning or to direct users to malicious content. The document body, though partially corrupted, contains text related to essays and the wkhtmltopdf tool, suggesting a lure to entice users to click on the embedded links. The ML classifier strongly indicates maliciousness, and the presence of numerous links to potentially malicious domains supports this assessment.

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://sta-66-99-58-206.ladse.org/uploads/1/3/0/7/130739383/130739383.html#exemplo+de+texto+dissertativo+argumentativo+nota+1000
    • http://tophcpa.com/uploads/1/3/0/6/130604631/1688211.pdf
    • http://massageredefined.com/uploads/1/3/0/6/130604494/5995023.pdf
    • http://inla.agency/uploads/1/3/0/8/130874246/sorarireralugiken.pdf
    • http://stylisharms.net/uploads/1/3/0/7/130739456/134079.pdf
    • http://rosetintedmama.com/uploads/1/3/0/4/130476171/9928048.pdf
    • http://247housebuyer.com/uploads/1/3/0/8/130814340/65964.pdf
    • http://upyourgameaz.com/uploads/1/3/0/5/130539871/9556972.pdf
    • http://studio173salon.com/uploads/1/3/1/1/131163957/wovutanemanapu-firaxa.pdf
    • http://judgeammendola.com/uploads/1/3/0/2/130289322/menolokimubox.pdf
    • http://charysewilliams.com/uploads/1/3/0/5/130588151/javugubagajajox.pdf
    • http://script-scanner.com/uploads/1/3/0/5/130589435/8779869.pdf
    • http://creategoodliving.com/uploads/1/3/0/6/130639526/tavopefezonobaja.pdf
    • http://getphotographed.net/uploads/1/3/0/5/130551363/laxidu.pdf
    • http://flairclubmilano.com/uploads/1/3/0/6/130639642/xiredigoz-wuxamuripenas.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_off00019966.bin
9221e6ad3e051e3ebcafdef884bff82cabb6f51b096100c404c5013a88105a33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19966 11392 bytes
font_01_sfnt_off0001be17.bin
7e03c15839e3ecb23fcc82f02695af6b409b7d372e10f8f052791b47abd01f5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE17 4328 bytes

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