Malicious PDF — malware analysis report

Static analysis result for SHA-256 69fa235012baece7…

MALICIOUS

PDF

36.9 KB Created: 2020-05-23 03:00:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e127a1cdf793863ee54e8424fb41084e SHA-1: bc5bbc76c28a22684d9c026d39a2612c9ab928b6 SHA-256: 69fa235012baece7100e053761cd51b547d35177517c23cb1e3482187335d9b7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. These links likely lead to malicious content or are part of an SEO spam campaign. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://li-asta-sbn.voyagerwebsites.com/uploads/1/3/1/4/131454035/131454035.html#dead+space+3+all+suits
    • http://raraavispress.com/uploads/1/3/0/7/130739177/wovop-mizaxolewav.pdf
    • http://sma-brands.com/uploads/1/3/0/6/130620320/6792081.pdf
    • http://livingpainfreepeople.com/uploads/1/3/0/2/130272512/6793395.pdf
    • http://schultzhydrocleaning.com/uploads/1/3/0/6/130639899/lelukenolut-jipuvop.pdf
    • http://pleasantmeadowfarm.org/uploads/1/3/0/8/130874142/251ea.pdf
    • http://wingeyecare.net/uploads/1/3/0/5/130551943/wamevifopesif.pdf
    • http://oath.community/uploads/1/3/0/7/130775310/letik-xagat-folabiguguze-rotamivope.pdf
    • http://systemsii.com/uploads/1/3/1/4/131483090/vujiludovane.pdf
    • http://duffdaze.com/uploads/1/3/1/1/131164537/fa43424.pdf
    • http://accelearningandenrichment.org/uploads/1/3/0/3/130313093/loren_tawoxinif_wimegukisajigo.pdf
    • http://happytraveling.net/uploads/1/3/0/6/130621901/felubari.pdf
    • http://healthymondays.net/uploads/1/3/1/4/131453610/vugiw-bibojam-rolijusiso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006393.bin
456b9b41e7a3a8763d33e09407bee77b8123c5264ac067daf9d82b22c7859c81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6393 10876 bytes

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