Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea7735e819abfe98…

MALICIOUS

PDF

30.3 KB Created: 2020-03-15 08:45:59 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 04fbae20313edf2c2aef200ef2a1217a SHA-1: ebb3d730a827474f38ae5d629675174f41fd31b8 SHA-256: ea7735e819abfe98e3343e96378ff4fcd4f50a277fbaea3f7529284bd1681626
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO spam or to distribute malicious payloads. The ML classifier strongly indicated maliciousness. The document body is heavily obfuscated and contains embedded URLs, reinforcing the malicious intent. No scripts were extracted, limiting the analysis of specific execution behaviors.

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://i94wdqna.brdge.org/uploads/1/3/0/2/130291784/130291784.html#char+broil+advantage+manual
    • http://mail.ramakearomatics.ca/uploads/1/3/0/6/130621839/winutejenivogufanudu.pdf
    • http://74-123-75-101.mgwnet.com/uploads/1/3/0/5/130539300/1b8de2ebb239152.pdf
    • http://7magicflower.com/uploads/1/3/0/5/130590469/8165512.pdf
    • http://www.wonderyearsfamilychildcare.com/uploads/1/3/0/4/130477455/tejema.pdf
    • http://www.realeventcoin.com/uploads/1/3/0/5/130540645/47689cb0872.pdf
    • http://ssuvhsg.ch/uploads/1/3/0/2/130273843/601501.pdf
    • http://www.revengetour.club/uploads/1/3/0/2/130289246/4770e6c621a1.pdf
    • http://nelsonendeavorsllc.com/uploads/1/3/0/5/130590169/gewameduk_texabogitapoka_zuzaretop.pdf
    • http://www.mrcoachreed.com/uploads/1/3/0/7/130775979/lojuririsefup-tedejogoxekup-vidoxugelidu.pdf
    • http://almudaifalawfirm.com/uploads/1/3/0/6/130639336/19d672c74379.pdf
    • http://thesoftearth.com/uploads/1/3/0/4/130488179/kijunew-sexiteki-furutemutazan-kejegexopun.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_off00004ef0.bin
64e2de5cdda44ef96af9a9cd4f8f96746a52d019574cf70d4acf7f2c7e16e0ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EF0 7104 bytes

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