Malicious PDF — malware analysis report

Static analysis result for SHA-256 24cfdfaa4155cd4d…

MALICIOUS

PDF

69.2 KB Created: 2021-09-18 07:37:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 01ca9eb4121161a4a86afc39f6f4e99a SHA-1: 4c8a039861566777ff3b449bfec48e7c2064adf1 SHA-256: 24cfdfaa4155cd4de8181f03c2884ea3cd63701d6fcf2a7500592cad8462d355
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, many pointing to disposable domains, which is a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to sites hosting further malicious content or exploits. While no scripts were directly extracted, the PDF structure and URL patterns suggest it's designed to facilitate the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7921

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://thediamangroup.com/_images/files/jutixerilevinadexuvuzek.pdf In PDF document text
    • http://hoadon-dientu.net/images/files/putelamamika.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/gadabuzokagizerolepirol.pdfIn PDF document text
    • https://pacie.vn/web/uploads/files/zukedej.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/nopaselajogiwiwuxa.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161380baad63c9---35748593366.pdfIn PDF document text
    • http://cpk.by/ckfinder/userfiles/files/bezovewulinik.pdfIn PDF document text
    • https://thokhoavietnam.com/upload/files/19348104750.pdfIn PDF document text
    • http://bancasemecanino.com/userfiles/files/34500434311.pdfIn PDF document text
    • http://sipzip.com/userfiles/file/9816181985.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/45468352679.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/65378130100.pdfIn PDF document text
    • https://ctcitsupport.com/media/files/50890373695.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/14836877668.pdfIn PDF document text
    • http://xn--krmer-dnnebacke-1kb72b.de/files/file/45601523342.pdfIn PDF document text
    • http://baove24h.info/upload/files/27384267280.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/rizapupaxe.pdfIn PDF document text
    • https://megacook.pt/site/upload/file/92763554888.pdfIn PDF document text
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/vekinelu.pdfIn PDF document text
    • https://volgogradexpo.ru/ckfinder/userfiles/files/nofamegitudo.pdfIn PDF document text
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/tibus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=a+silent+voice+movie+onlinePDF link annotation
    • 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_off0000ed6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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