Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b4dfdab0a652f7f…

MALICIOUS

PDF

32.4 KB Created: 2020-05-25 08:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abc727e9e19f56fb0971252a6d507715 SHA-1: 96a96c76fccedc644727f86698d1238fe5d8bd4f SHA-256: 8b4dfdab0a652f7f1ee9d0daa2f88285e28792265d93b2510e6ea2f911c8bc68
92 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves directing users to a network of potentially malicious or spam-related content through these embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://6p.undesirable.us/uploads/1/3/0/5/130543855/130543855.html#meydan+larousse+pdf
    • http://viaproof-inventory.com/uploads/1/3/0/8/130815277/3668782.pdf
    • http://benbrussell.com/uploads/1/3/0/2/130271217/9120698.pdf
    • http://nofap.site/uploads/1/3/1/4/131452935/pinawizotapof-kukaparowisumu.pdf
    • http://annalouiselifecoaching.com/uploads/1/3/1/0/131070279/4a592d8.pdf
    • http://fancymynails.com/uploads/1/3/0/5/130589339/gezode-wowililoj-fufudekevifuvu.pdf
    • http://marcovarchetta.com/uploads/1/3/0/9/130969586/nawijitaxo.pdf
    • http://tragedyacademy.com/uploads/1/3/1/6/131606346/c89751c.pdf
    • http://veerkracht-paardenmassage.nl/uploads/1/3/0/4/130489604/mumatitijekonadokew.pdf
    • http://rgtaz.info/uploads/1/3/0/5/130547659/rojuninafinanif.pdf
    • http://mariakalaffdesigns.com/uploads/1/3/1/3/131379530/2491707.pdf
    • http://balmypalmy.com/uploads/1/3/0/6/130603903/db8f3f1aa8b4.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_off0000523e.bin
27e27c8d864e7ff8de8461db77839292bda2d8d6b0f2555fbd39f3b95bcc3dec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x523E 10868 bytes

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