Malicious PDF — malware analysis report

Static analysis result for SHA-256 c914bdec7487462d…

MALICIOUS

PDF

78.1 KB Created: 2021-10-07 17:14:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: c07a7b2564929202690b227500a65160 SHA-1: 7fd860ba5a8b35b1e505a1aa0799eba0c5241e3b SHA-256: c914bdec7487462d1a0bfb385b7b36da7fbeac50bdecc6ba854ea429a877cd24
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs pointing to external sites, some of which are hosted on disposable domains, suggesting a link farm or phishing lure. The presence of external URIs and the overall detection pattern align with spearphishing attachments used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7395

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://crewmak.ru/uplcv?utm_term=i+have+a+abscess PDF link annotation
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615bc2406113a---wubanusewedanirafutudurig.pdfIn PDF document text
    • http://tulga.ru/editor/files/mubunekanakarus.pdfIn PDF document text
    • http://taxplus.in/images/contentimages/files/98944315657.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/88725582741.pdfIn PDF document text
    • http://akvatoria.by/UserFiles/files/61738209041.pdfIn PDF document text
    • https://apc-algercentre.dz/ckfinder/userfiles/files/nixenonezami.pdfIn PDF document text
    • https://people11people.gr/uploads/File/83100378022.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/54190686632.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614b170c2f6b6---28654140766.pdfIn PDF document text
    • http://bladensburg.abwingsmd.com/uploads/files/xanak.pdfIn PDF document text
    • http://spl-designs.com/ckfinder/userfiles/files/wizonofisitubepid.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/24677087254.pdfIn PDF document text
    • http://antonellascarpittadesigner.it/userfiles/files/kenasunik.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/42068717815.pdfIn PDF document text
    • http://cloudinfo01.smartevolve.com/images/ckeditor/files/rodoba.pdfIn PDF document text
    • http://www.trisad.kz/ckfinder/userfiles/files/42967893288.pdfIn PDF document text
    • http://seyrimerdin.com/userfiles/file/82240589047.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/pogisazudo.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/fitaro.pdfIn PDF document text
    • https://sportyou.fr/ckfinder/userfiles/files/nawisaluwusaxovirugo.pdfIn PDF document text
    • http://qdsenfeng.com/data/files/rokojig.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC75 19140 bytes
SHA-256: c71121c0ebc7bd89550366c81dc8d0e041e0afc6f04d38398a9ab67b924bedcf

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