Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e66659c6fa6121a…

MALICIOUS

PDF

43.4 KB Created: 2020-03-30 19:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: acaf42ff2762dbd0f951cbf0b350dc75 SHA-1: c63c11df761fd06ee2d5b20c50ec68aa1306ae42 SHA-256: 2e66659c6fa6121ab9b92774639bc8a6ed1909d3919d6648500b5c180f6fc1f6
92 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing numerous external links to other PDF documents hosted on various domains. The primary heuristic, PDF_SEO_LINK_FARM, indicates a mass of external links, suggesting a tactic to manipulate search engine results or distribute content across many sites. The ML classifier also strongly flagged this file as malicious. The embedded URLs are the main indicators of malicious activity, likely serving as lures or redirects.

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://togstudios.us/uploads/1/3/0/7/130739729/130739729.html#should+mutually+agreed+upon+be+hyphenated
    • http://pathfans.com/uploads/1/3/0/6/130603976/e572c3c79a45ce.pdf
    • http://jmdesignllc.net/uploads/1/3/0/7/130739856/ziwafebojibune-pixenoxoresud.pdf
    • http://jaredambler.com/uploads/1/3/0/4/130478314/718103.pdf
    • http://divacollectiononline.com/uploads/1/3/0/5/130588982/794a04952a20.pdf
    • http://flavoreffects.com/uploads/1/3/0/2/130287852/98ac8e19a77.pdf
    • http://beeronlyfast.com/uploads/1/3/0/5/130590438/2b0a1908bf82d6.pdf
    • http://skymunkeys.com/uploads/1/3/0/5/130543141/gofipisoxi_gerasuviwixip_nuxixiwof_xivelik.pdf
    • http://northcountypronetworkers.com/uploads/1/3/0/8/130813840/539786940e.pdf
    • http://firstpresnewton.com/uploads/1/3/0/6/130605471/a9d90d657.pdf
    • http://desperaterecords.com/uploads/1/3/0/4/130478831/092cadabbf7c.pdf
    • http://shilohrealty.org/uploads/1/3/0/8/130874326/divigularas.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cb1.bin
650da69c5d71959df1a029c7e04f484c50e0937a4b600fcd750068a070b3e1c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB1 8048 bytes
font_01_sfnt_off00008b9c.bin
3134244e55a5732fdec76e8f806fa6586867d6deae5fdf43bc054f4b85360c5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9C 16068 bytes

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