Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc275b1f0a12eb44…

MALICIOUS

PDF

32.5 KB Created: 2020-06-16 05:18:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d0fdab8eb1a63da90a99262be2855f5 SHA-1: 9c25ac37ba929e302989f7dcdb188d6a42c83c9d SHA-256: bc275b1f0a12eb4431c1aeb2b437cdc9d5e533c0bd68ede91c3a055f5ef8cdd4
122 Risk Score

Malware Insights

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

This PDF file is identified as a dropper by ClamAV. It contains a large number of external links, many of which point to other PDF files hosted on various domains. The document body, though heavily obfuscated, also contains these URLs, suggesting a link farm or redirection mechanism. The primary intent appears to be directing the user to a network of malicious websites, likely for further exploitation or content delivery.

Heuristics 4

  • 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.
  • ClamAV: Pdf.Dropper.Agent-8775825-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8775825-0
  • 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://ournaturetonurture.ca/uploads/1/3/1/4/131453982/131453982.html#adding+and+subtracting+monomials+worksheets+free
    • http://syndicatesupply.com/uploads/1/3/2/6/132682813/jaletug_gipisonozatit_xodat.pdf
    • http://frenchtownproperty.com/uploads/1/3/0/2/130287894/9b53594e1a.pdf
    • http://aegisve.com/uploads/1/3/0/7/130776485/9848928.pdf
    • http://timbeccuecello.com/uploads/1/3/1/3/131380292/6837212.pdf
    • http://dwarvenworkshop.com/uploads/1/3/2/3/132303156/vubajodisepotoluv.pdf
    • http://thisoklahome.com/uploads/1/3/0/4/130491599/495807.pdf
    • http://sabahraphaelreed.com/uploads/1/3/0/8/130874108/lumodifunisaxaxoxafi.pdf
    • http://cameronvocalmusic.com/uploads/1/3/0/6/130639267/gevenorajikeburazej.pdf
    • http://craftyourvoice.com/uploads/1/3/1/3/131384484/3300333.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_off0000538e.bin
d2cc7bccdb59c584ba4d32be7db71bd3d67d4f0dcc2ce0069691b7616e4321cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x538E 10372 bytes

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