Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce16a93fcad42006…

MALICIOUS

PDF

37.1 KB Created: 2020-05-09 05:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: be5d3716c09ba35be53e53ddb08f7966 SHA-1: 25d622a8fba20a31485937d5e1e48a0ecf235745 SHA-256: ce16a93fcad42006768b5c2bf01735e341e5c6d26083f97b0eff36005b9f8be8
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to other PDF files. This pattern is indicative of a link farm designed to distribute malicious content or traffic. The ML classifier strongly supports the malicious verdict. No scripts were extracted, and the document body was heavily obfuscated, but the presence of numerous external links is the primary indicator of malicious intent.

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://desertpoppy.net/uploads/1/3/0/5/130551103/130551103.html#texas+franchise+tax+report+2020
    • http://mfundodazzling.com/uploads/1/3/0/6/130604588/vanojebu.pdf
    • http://remotesat.tv/uploads/1/3/0/2/130288540/bevidodafozoloj-tefuv-lutopenixuletu.pdf
    • http://pmconsultancy.website/uploads/1/3/0/4/130436402/4112074.pdf
    • http://klrboutique.com/uploads/1/3/0/7/130739536/piloraba-luresamenaga-zoxejisabaw.pdf
    • http://reedinstructionaldesign.com/uploads/1/3/1/4/131452821/vudajovurozil_sajewiv_jopari.pdf
    • http://urconqueror.com/uploads/1/3/0/7/130774973/2830318.pdf
    • http://glenbrookfarms.org/uploads/1/3/0/5/130590186/xalepaxizajeva.pdf
    • http://lindagudnason.com/uploads/1/3/0/4/130476573/5778150.pdf
    • http://utahcasketsdirect.com/uploads/1/3/0/2/130288465/64367a9d40.pdf
    • http://theremoteworkplace.io/uploads/1/3/0/5/130589413/d12c777a7.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • 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_off000061fb.bin
b251c879130e4035747a997ba573a74fb18c4cda0858e28a466d4171588a3271		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61FB 11552 bytes

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