Malicious PDF — malware analysis report

Static analysis result for SHA-256 97c1c54034ae7fdc…

MALICIOUS

PDF

36.1 KB Created: 2020-10-06 11:40:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1f86e6a9d11afccfe57239833053080f SHA-1: 41e4b59bc2522d29f8c83b731cbfa5b1400eafdb SHA-256: 97c1c54034ae7fdcafc9b7c31cf07e49dbc2ffb63553763a52de2da2a6d912cf
182 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://gettraff.ru/strik?keyword=ukulele+chord+chart+with+finger+numbers+pdf In PDF document text
    • http://niwakuzo.rock-n-water.com/uploads/1/3/1/4/131438044/3036214.pdfIn PDF document text
    • http://sexenunod.peterregelous.com/uploads/1/3/1/3/131383678/kezizanaxed.pdfIn PDF document text
    • http://files.liztyner.com/uploads/1/3/1/0/131071063/wanavi-meviremeroku-jemomobigi.pdfIn PDF document text
    • http://files.coupar-angus.co.uk/uploads/1/3/0/7/130739994/remulil_xazagelid.pdfIn PDF document text
    • http://files.dixonwrestlingclub.com/uploads/1/3/1/0/131069921/6704504.pdfIn PDF document text
    • https://site-1041486.mozfiles.com/files/1041486/sijus.pdfIn PDF document text
    • http://files.sacredtellings.com/uploads/1/3/1/3/131398541/e655fb.pdfIn PDF document text
    • http://lozod.feliciasmusicstudio.com/uploads/1/3/0/8/130814328/9798678.pdfIn PDF document text
    • http://mebime.shinnbros.com/uploads/1/3/1/6/131637257/liwotogetonufa.pdfIn PDF document text
    • http://lakoja.paleocurious.com/uploads/1/3/1/8/131871390/jasemuzanaduzo-punip-tawabezexilura.pdfIn PDF document text
    • http://nawonew.a-1autoinc.com/uploads/1/3/1/4/131453724/sozavosijun-gizamugano-xaxusufuzevi.pdfIn PDF document text
    • https://site-1036678.mozfiles.com/files/1036678/buxidebarabo.pdfIn PDF document text
    • https://site-1038961.mozfiles.com/files/1038961/69948779142.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000712c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x712C 5856 bytes
SHA-256: 656b47669ae28f66d853c9f6196096a1a8800bc3f55038b53aac413cf35578e2

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