Malicious PDF — malware analysis report

Static analysis result for SHA-256 f89be7d35d1f34f2…

MALICIOUS

PDF

66.6 KB Created: 2021-04-19 17:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12e5eb714b34ae3f07b73d3f6804ea92 SHA-1: 7015808103371b4463b23bc50e5fababc3afbfa6 SHA-256: f89be7d35d1f34f2b2867d6a9aa673f4bfd1e74559e41d4254fa29acec11e2e7
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one heuristic identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7866

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 https://europa-ts.ru/sites/default/files/webform/6529842099.pdf
    • http://klm3fg.grhosting.cz/sites/default/files/webform/files/tekuxegejarikuferibo.pdf
    • https://www.ofalloncasting.com/sites/default/files/webform/66890294103.pdf
    • http://russian-ice-spb.ru/sites/default/files/webform/files/77599308563.pdf
    • http://www.muttypawsacademy.com/sites/default/files/webform/vaccines/65827293628.pdf
    • https://www.dgs-interparts.be/sites/default/files/60165950635.pdf
    • https://extranet.blanchisserie-toulousaine-de-sante.com/sites/extranet.blanchisserie-toulousaine-de-sante.com/files/documents/justificatifs/vawutudujenopudup.pdf
    • https://extranet.blanchisserie-toulousaine-de-sante.com/sites/extranet.blanchisserie-toulousaine-de-sante.com/files/documents/justificatifs/29410319198.pdf
    • http://cicatsalud.com/html/sites/default/files/webform/28693943460.pdf
    • https://www.termis.org/system/files/webform/dexifivoneput.pdf
    • https://www.jsif.org/sites/default/files/webform/94808830073.pdf
    • https://www.jwico.com/sites/default/files/webform/vuvosiritixulufanili.pdf
    • https://www.natsihwa.org.au/sites/default/files/webform/zolevijovexoneda.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+find+table+value
    • https://www.healthdata.org/sites/default/files/resumes/mavesoriv.pdf
    • https://ec.europa.eu/eip/agriculture/sites/default/files/webform/9071701793.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d48d.bin
590a7a96b88529b098264395c4fc352cd4c5b3172ee5649c56994851846e1336
pdf-font-stream PDF embedded font (sfnt) at offset 0xD48D 4764 bytes
font_01_sfnt_off0000e4e6.bin
492416d3a850b7c9c656137220841a77c55f854a782a29cd3b37a7f21ac2d0ea
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E6 10528 bytes