Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bd4dda3f499018d…

MALICIOUS

PDF

34.2 KB Created: 2020-04-09 11:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ad1d2a18525165c677ac64f997713cb4 SHA-1: 0748229a440cdc8a8868293b5c3075258aef8e65 SHA-256: 7bd4dda3f499018d01435d55a51559bfb1171746bdf1a16e843389ec78ed8efe
92 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious. It contains a large number of external links, many of which point to PDF files hosted on various domains, suggesting a link farm or redirection tactic. The primary purpose appears to be SEO manipulation or directing users to potentially harmful content through these numerous external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://extravirgincoffee.com/uploads/1/3/0/4/130488175/130488175.html#que+es+sufijo+del+nombre
    • http://peacefulperks.net/uploads/1/3/0/6/130639569/vorasebaferova_gopejaxep_ziwunifef.pdf
    • http://affiliateblackbox.de/uploads/1/3/0/4/130476248/wogabopokel.pdf
    • http://homelifeoutlet.com/uploads/1/3/0/5/130551641/pigibov.pdf
    • http://luciablu.com/uploads/1/3/1/1/131163856/7669453.pdf
    • http://premierehomedesign.com/uploads/1/3/0/5/130551654/9163643.pdf
    • http://stonededit.com/uploads/1/3/1/0/131070459/8013b.pdf
    • http://rockypointmissions.net/uploads/1/3/0/2/130274263/9304953.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_off00005dfd.bin
9d48f5e365bd051f88b8ec52a812a9f64d2bca1ba99d33b99437bfd8e19336b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFD 8432 bytes

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