Malicious PDF — malware analysis report

Static analysis result for SHA-256 72aeeb4617bdb5bd…

MALICIOUS

PDF

44.4 KB Created: 2020-04-09 01:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a1617d271cc5a17d8d42e09a11a80beb SHA-1: 0f188857a1c6f14c1296716b1078e657a63f3f7a SHA-256: 72aeeb4617bdb5bd6202f27f7c9346d0a89e65e5f1ec466253250a216b3cbc6b
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, suggesting a link farm or redirection tactic to lead users to potentially malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates the presence of numerous external PDF links, and the ML classifier strongly flagged this PDF as malicious. The embedded URLs are likely part of a campaign to drive traffic to compromised or malicious sites.

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://westcoastescrrow.com/uploads/1/3/1/4/131453045/131453045.html#plague+city+quick+guide
    • http://businessenglishnews.com/uploads/1/3/0/3/130379743/b11f1.pdf
    • http://bouvierevents.com/uploads/1/3/1/4/131454807/b9cb01636.pdf
    • http://bargainpricedpalletplace.com/uploads/1/3/0/2/130270974/9494699c3.pdf
    • http://jrhythm.com/uploads/1/3/0/6/130603932/wazam.pdf
    • http://babyerstausstattung.tips/uploads/1/3/0/4/130435743/3761188.pdf
    • http://everythingcpap.net/uploads/1/3/1/4/131407267/mipimo-fivego-rapawufi-tibisa.pdf
    • http://wagonwheelproductions.com/uploads/1/3/0/6/130621383/fawam.pdf
    • http://guitarbravado.com/uploads/1/3/0/8/130874180/tekuruwopegezijenuz.pdf
    • http://fintec.investments/uploads/1/3/0/7/130775071/9272535.pdf
    • http://seadragonstyle.com/uploads/1/3/1/1/131163516/4216907.pdf
    • http://exseedhydroseed.com/uploads/1/3/1/1/131164079/6265511.pdf
    • http://melodyesthertulier.com/uploads/1/3/1/4/131407695/botimosoliliz_refomot_livejexixefiga.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070af.bin
6cc9931724f6e0adf557fa4b9054846d19ce6525bf125c268c0f7e5d21683879		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70AF 7944 bytes
font_01_sfnt_off00008f7b.bin
0f23141ba94d37b49c53016ac63a9b008a6ac8e4c4656a8d80e6725f77750189		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F7B 16140 bytes

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