Malicious PDF — malware analysis report

Static analysis result for SHA-256 12064fc81042372e…

MALICIOUS

PDF

38.1 KB Created: 2020-04-11 03:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 37ba7e5483762a869237d8b4eb3452e3 SHA-1: 7d606db6d2457ddad586fa5bed07c434770a3d42 SHA-256: 12064fc81042372eca8a7011e2013fabd6be4f073d9e8fde294f50a2988a90af
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to other PDF files, indicating a link farm or SEO spamming operation. One of the embedded URLs, http://beyondhillco.com/uploads/1/3/0/2/130289189/130289189.html#depeche+mode+monument+book, is directly referenced in the document body. The ML classifier strongly flagged this PDF as malicious, suggesting it is part of a malicious campaign.

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://beyondhillco.com/uploads/1/3/0/2/130289189/130289189.html#depeche+mode+monument+book
    • http://fitvangelist.net/uploads/1/3/1/4/131438592/xarafivojobixevore.pdf
    • http://newfoundationsaba.com/uploads/1/3/0/6/130604793/c0b029f.pdf
    • http://mrprcat.com/uploads/1/3/0/9/130969965/kiretonevone.pdf
    • http://elecplumbuk.com/uploads/1/3/0/6/130639835/8770946.pdf
    • http://wildbeesboutique.com/uploads/1/3/0/6/130605393/7350560.pdf
    • http://jakryanphotography.com/uploads/1/3/0/6/130603929/buxetiromerili_zufuremu_feguw_rojojami.pdf
    • http://streetlightingsigns.com/uploads/1/3/0/6/130603728/tegosipukagares.pdf
    • http://nooker7investments.com/uploads/1/3/0/8/130874164/03c2737.pdf
    • http://kempersmasterschallenge.com/uploads/1/3/0/5/130538925/vifujakebagodili.pdf
    • http://majidkllc.org/uploads/1/3/0/5/130540106/manamudaw.pdf
    • http://thecomputerman.ca/uploads/1/3/0/7/130775435/xokakajo.pdf
    • http://myapolloapp.com/uploads/1/3/1/4/131438510/mosafololajavi-tenuzexit-fenanugasa-salidexaxi.pdf
    • http://ldspodcasts.com/uploads/1/3/0/2/130291371/gilew-zemesipo-guxodamer-gijafozutatibil.pdf
    • http://migpoetry.com/uploads/1/3/0/6/130603917/puxebarodabufal.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_off00006dc1.bin
a1dd8669f9ee6478d1d1b700a9797c27ea2a4d7c277bd1aa4df62b184a8d1938		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC1 7900 bytes

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