Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7702ba2d20ef7a1…

MALICIOUS

PDF

53.5 KB Created: 2020-06-25 08:04:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: babe851160c29654b5ee197c355674ec SHA-1: bffcb8a390df8c948c884ad438798852f13efdf2 SHA-256: d7702ba2d20ef7a1a4d976c150aebddb9d7d5cf66b86394a2362c5c58b72e1c8
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to domains designed to appear as legitimate content repositories. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, likely for SEO manipulation or to host malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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://mta-sts.mail.themitchellschool.com/uploads/1/3/0/7/130740320/130740320.html#physiological+jaundice+in+newborn+pdf
    • http://crazy-life-of-me.com/uploads/1/3/1/3/131383958/cbdc99.pdf
    • http://successfulsalesagency.com/uploads/1/3/0/5/130588497/4ec9c4da16.pdf
    • http://ridgidfitness.com/uploads/1/3/0/2/130289310/sixizimigelijoj-wulovoniv-gijepowiposudu-posid.pdf
    • http://at87rer.butterfly520.com/uploads/1/3/0/6/130604379/nenavasawamisu.pdf
    • http://bbernardco.com/uploads/1/3/0/5/130551962/sebebeditob_moxagonet.pdf
    • http://hostmaster.hifi-studio-gaertner.de/uploads/1/3/1/4/131408502/tewapibovojoza-sajujexuvaza.pdf
    • http://store.mindregard.com/uploads/1/3/0/6/130605120/6881752.pdf
    • http://pentak.org/uploads/1/3/1/6/131606197/kadezoxebi-dewazama.pdf
    • http://encore00034.voyagerwebsites.com/uploads/1/3/0/4/130488217/c15582c.pdf
    • http://mta-sts.mail.elginartsassociation.com/uploads/1/3/1/3/131379456/7543381.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_off00009114.bin
274c70058c71c94d11b867c6b0540c8ce53831a5d91cdee482b15894ea6e76e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9114 5632 bytes
font_01_sfnt_off0000a42f.bin
eb471306b65b10bbfb56684d937a012fe1f7ca7ec0572ac8c996b770b29d2420		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA42F 11064 bytes

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