Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9bf71a0eef78832…

MALICIOUS

PDF

34.8 KB Created: 2020-04-05 09:09:53 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 72ae53d34c7911278577833c3b8adf6f SHA-1: 8c3924f8f04da685337322713deeebcf0524e90b SHA-256: b9bf71a0eef78832988a6629248a3086356f30981b03fa3c4211844292304bb2
62 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, many of which point to other PDF files. This behavior is indicative of a link farm or SEO poisoning technique, likely intended to drive traffic to malicious sites or host further malicious content. The document body itself contains text related to 'The human body an orientation worksheet answers', which appears to be a lure to disguise the malicious nature of the embedded links. No scripts were extracted, and the primary malicious activity observed is the mass embedding of URLs.

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://abacobahamashurricanerelief.org/uploads/1/3/0/7/130739829/130739829.html#the+human+body+an+orientation+worksheet+answers
    • http://byyourlight.com/uploads/1/3/0/4/130435631/3797914250.pdf
    • http://snowflakeinsurrection.net/uploads/1/3/0/8/130814666/65b9e9cdd.pdf
    • http://kelliebfit.net/uploads/1/3/1/4/131438348/mejazusizinik.pdf
    • http://towparttimestaffresources.com/uploads/1/3/0/9/130969915/b1ad6dc44fa6.pdf
    • http://bagelboulevard.com/uploads/1/3/0/5/130589334/dituwafaji.pdf
    • http://thebeastfromsoutheast.com/uploads/1/3/1/3/131383416/c375f5068e.pdf
    • http://thebambooretreat.com/uploads/1/3/0/5/130589339/6485868.pdf
    • http://smhsstantonmobilehomesales.com/uploads/1/3/0/9/130969169/duxutaronukuxa.pdf
    • http://laoyemiao.com/uploads/1/3/0/3/130379173/pibepar.pdf
    • http://thephillycomic.com/uploads/1/3/0/7/130775724/7295012.pdf
    • http://flyingaroundtheglobe.com/uploads/1/3/0/9/130969370/pebazovebaganotegego.pdf
    • http://dndental.com/uploads/1/3/0/5/130540280/4092435.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_off000060d3.bin
f048483956ca3ed1d87b482c9ad0d40e0c2ce6c5320826acd74b33d2116f55dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D3 7428 bytes

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