Malicious PDF — malware analysis report

Static analysis result for SHA-256 aac08fd2886dee1c…

MALICIOUS

PDF

38.3 KB Created: 2020-04-03 01:45:35 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a3e1fcc2fc665099e0af25a34f2af5db SHA-1: 20fbe79b13da883416dc57f2558828ea2fe86315 SHA-256: aac08fd2886dee1caa1cc8eb51e8977811eacea4f9c346c08d8c4724f2a2c593
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO spam tactic. The document body mentions 'Ozark trail dome tent instructions', a common lure to entice users to click on the embedded malicious URLs. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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://scrubs4work.com/uploads/1/3/0/6/130620986/130620986.html#ozark+trail+dome+tent+instructions
    • http://ward-labs.com/uploads/1/3/0/5/130539691/nufawarek.pdf
    • http://kelbandyengineer.com/uploads/1/3/1/4/131438532/fac7c.pdf
    • http://resourcesforfamiliesmiamivalley.com/uploads/1/3/0/7/130775961/fefaju.pdf
    • http://jesuschristandmarymagdalene.org/uploads/1/3/0/7/130739222/7338298.pdf
    • http://dimet.asia/uploads/1/3/0/7/130775498/nizevakes.pdf
    • http://visionary-affairs.com/uploads/1/3/0/6/130603936/nemaju-gazud.pdf
    • http://everythinglaurajo.com/uploads/1/3/0/8/130814669/refovifimamop.pdf
    • http://homesteadfeedandmercantile.com/uploads/1/3/0/4/130483052/wokogiwunijev_pokoriv_lawizuwigo.pdf
    • http://hsrenovations.com/uploads/1/3/0/3/130379114/pesabozojosabis.pdf
    • http://yebutton.com/uploads/1/3/0/6/130604344/zodowevam-sijokivomelu.pdf
    • http://tempodocs.com/uploads/1/3/1/3/131383613/vagamikazafux-zifokesulib-xijokudod.pdf
    • http://campcedarwood.org/uploads/1/3/0/5/130544541/maxowimuwowe.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_off00006a54.bin
9ca6cea31f2a3d00bc8372f1fb497fbfe76b3c96525fee8649fd912fbc3b8580		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A54 8472 bytes

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