Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b60b8cc63d563d7…

MALICIOUS

PDF

41.3 KB Created: 2020-05-25 14:13:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd998e499b2ad357e792b61ac5006ee0 SHA-1: 8ed34eb3b157304b03de41de54b15b7516e95b0c SHA-256: 2b60b8cc63d563d77d09fd3d34f9d4a3ba4118b73773fa26d5947615ce7e2f46
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, characteristic of a link farm designed to distribute malicious content. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of numerous external PDF links. The document body, though heavily obfuscated, contains URLs that are also listed as IOCs, suggesting the primary purpose is to redirect users to these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://deborahsnider.com/uploads/1/3/1/6/131637009/131637009.html#becoming+batman+the+possibility+of+a+superhero+free+pdf
    • http://quetpieschildrenboutique.com/uploads/1/3/1/0/131070489/3373777.pdf
    • http://static.slowmusic.pl/uploads/1/3/0/6/130604996/8500957.pdf
    • http://webdisk.ncclayworks.org/uploads/1/3/0/6/130604386/birewijavokade-retas-kipizuwo-biziwesaf.pdf
    • http://suzynsam.com/uploads/1/3/0/6/130639872/garudapebanutak_xejuluw.pdf
    • http://terrifiedwhiteys.com/uploads/1/3/0/5/130590325/pebamoxubi.pdf
    • http://ourworldtravel.org/uploads/1/3/0/6/130621614/1260630.pdf
    • http://bobisanerd.com/uploads/1/3/0/6/130620538/dobekijelul.pdf
    • http://teamgamenight.com/uploads/1/3/0/6/130621928/5936154.pdf
    • http://kimberleycohen.com/uploads/1/3/1/0/131071286/xakagixemamuxapow.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_off0000763d.bin
cbabf8884c7add78cb125b69b7d4049d4fc848e680463cccc8a74d6c8b68bf8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x763D 10488 bytes

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