Malicious PDF — malware analysis report

Static analysis result for SHA-256 faf16cf05967c865…

MALICIOUS

PDF

30.7 KB Created: 2020-04-10 17:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a2e213f893daf2e614e44266068c6a1a SHA-1: 3481a03b6bd0276ca1ab5aafa99bf85dfc4d9d8f SHA-256: faf16cf05967c865b9fa69f20c2bef8161f42b4598c6b03c6f9a02dfef966730
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the observed link farm behavior. No scripts were extracted, and the document body was largely unreadable, making it difficult to determine the exact user-facing lure.

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://adventureinstincts.com/uploads/1/3/0/2/130288753/130288753.html#eba+domb%C4%B1ra+izle
    • http://earhartcorporatecenter.com/uploads/1/3/0/9/130968906/6b31484ef.pdf
    • http://bbartbyangelica.com/uploads/1/3/0/5/130588656/relezujoru-jibunexunijoxus-jofowe-pozosewosolibo.pdf
    • http://ipexpress.org/uploads/1/3/0/6/130621093/b30d586a266a.pdf
    • http://nyfe.app/uploads/1/3/1/4/131454466/wifitabekak.pdf
    • http://jrswisher.com/uploads/1/3/0/2/130289334/saginujoloko.pdf
    • http://theglamstop.com/uploads/1/3/0/8/130873941/pufiluzilejapi-jamew.pdf
    • http://cpsaug.com/uploads/1/3/0/9/130969306/3635141.pdf
    • http://whitegloveofallon.com/uploads/1/3/0/8/130814339/f889f50bca.pdf
    • http://katemariefoster.com/uploads/1/3/0/4/130436154/rafodupazi-paperoguwadorot.pdf
    • http://mayalockett.com/uploads/1/3/0/7/130775001/wekudajidarut.pdf
    • http://sjcconsulting.org/uploads/1/3/0/6/130639872/83e065.pdf
    • http://beastinfitness.net/uploads/1/3/1/0/131071117/zinegav.pdf
    • http://movingtherightway.net/uploads/1/3/1/0/131069759/xuwiliwobimikupe.pdf
    • http://caravanownersclub.org/uploads/1/3/0/5/130588783/fafir.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_off000050fe.bin
c9724c2ca43fa29a4283caaafdd2591320efb6a8d334422b87e9b52a25d59c65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50FE 7408 bytes

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