Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d7c30916cac2b84…

MALICIOUS

PDF

47.9 KB Created: 2020-03-21 19:04:08 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2361b5c07bc0c086ecf82ebf8c8b362e SHA-1: 1bdb8beaf15c3ba49ecadcb15e93a80b8d61256b SHA-256: 6d7c30916cac2b84964284324326a8f01cf6d4024a6d46c61675b77f72bcfda6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links to various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains a URL that matches one of the extracted links. This suggests the primary purpose is to redirect users to a network of linked content, potentially for SEO manipulation or to host further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://mermaidfitnessbump.com/uploads/1/3/0/2/130289782/130289782.html#mise+a+jour+geant+4040+hybrid+plus
    • http://allisonyelton.com/uploads/1/3/0/6/130620393/tutunikuligaz.pdf
    • http://123-bonus.site/uploads/1/3/0/2/130289304/97eedd719143f.pdf
    • http://myshinglesstory.com/uploads/1/3/0/2/130270863/bijujujijelafo.pdf
    • http://rhinotruckparts.com/uploads/1/3/0/6/130604725/2425410.pdf
    • http://mindovermadden.net/uploads/1/3/0/7/130740232/6088184.pdf
    • http://hoperestoreduk.com/uploads/1/3/0/2/130270932/5416557.pdf
    • http://farecall.uk/uploads/1/3/0/7/130739871/1907846.pdf
    • http://cuscuzetapioca.com/uploads/1/3/0/5/130588913/d93aae.pdf
    • http://hostmaster.m2ahk.com/uploads/1/3/1/0/131071095/07b012.pdf
    • http://bookflashtrailers.com/uploads/1/3/0/4/130483322/4010607.pdf
    • http://extract-cloud.com/uploads/1/3/0/7/130739836/wekefoxasimal.pdf
    • http://kauaimobilewellness.com/uploads/1/3/0/6/130639508/4645731.pdf
    • http://iripr.org/uploads/1/3/0/4/130483953/kozozolazenejokiri.pdf
    • http://jamesferrismusic.com/uploads/1/3/0/4/130483273/8565503.pdf
    • http://riseroofer.com/uploads/1/3/0/6/130603676/vokopikifirowezidiga.pdf
    • http://aksboutique.com/uploads/1/3/0/5/130588188/7066171.pdf
    • http://montanahollidayglass.com/uploads/1/3/0/8/130814611/7184303.pdf
    • http://beaufortvacationrental.com/uploads/1/3/0/4/130483684/zadesugedizezoguga.pdf
    • http://newmexiconeuromuscular.com/uploads/1/3/0/2/130289295/riwom.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000841e.bin
05db9f0652c270e07af0965dd834c6a04fb39abd0fa1c4262fef8fc80b35c3b9		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x841E 25244 bytes
font_00_sfnt_off0000650f.bin
116d24be6818eb03332a1a97fc5cc50f14f5527ad8f1402e7b49c029b2884538		 pdf-font-stream PDF embedded font (sfnt) at offset 0x650F 8684 bytes

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