Malicious PDF — malware analysis report

Static analysis result for SHA-256 a92f02e869e033e2…

MALICIOUS

PDF

64.0 KB Created: 2021-10-01 17:46:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e45370a85862fd0db7cba435f90bd4fe SHA-1: e8ba5630559659d43385c5ba9d018696df9bdee9 SHA-256: a92f02e869e033e2d8c1c66e979665f717e3bdba29774eb62f7c5dd97152d74d
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are embedded within a link farm structure on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7095

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://catamma.ru/uplcv?utm_term=the+thief+of+always+pdf PDF link annotation
    • http://bertrandetgastineaudesigners.fr/userfiles/file/42144772240.pdfIn PDF document text
    • http://namuvaldymas.lt/userfiles/file/rewalorizotajimevuwik.pdfIn PDF document text
    • http://bretagne.annuaire-regional.com/ckfinder/userfiles/files/84074039847.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/00c6cf4c047adfe95001f27faf7fd1b5/levujixeka.pdfIn PDF document text
    • http://rtm-plus.com/ckfinder/userfiles/files/74328421616.pdfIn PDF document text
    • https://www.temtechnologies.fr/ckfinder/userfiles/files/dadisi.pdfIn PDF document text
    • http://struttur-arch.it/userfiles/files/55700225471.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/bamufagejofumibewubisubu.pdfIn PDF document text
    • http://paletydozahrady.cz/ckfinder/userfiles/files/45086279968.pdfIn PDF document text
    • http://sadvita.lt/pav/file/towuse.pdfIn PDF document text
    • https://youxsoft.com/uploads/files/10273267906.pdfIn PDF document text
    • http://21cedu.com/pds/userfiles/files/33910731263.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/vagejokegaxolakezatupura.pdfIn PDF document text
    • http://rfaaa.com/UploadFile/file/20211001104916350.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/sexatisupafate.pdfIn PDF document text
    • https://samajsutra.com/userfiles/files/paremamepebikeb.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/87944034266.pdfIn PDF document text
    • http://studiomarazzi.eu/userfiles/files/xatugixog.pdfIn PDF document text
    • https://tranhdaquyhn.com/uploads/news_file/37893398574.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/6907941459.pdfIn PDF document text
    • http://industrialsupplies.pk/userfiles/files/13206294670.pdfIn PDF document text
    • http://haiannweb.com/uploads/files/20721528763.pdfIn PDF document text
    • https://zenithoverseas.com/assets/userfiles/files/46454099582.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/tegurat.pdfIn PDF document text
    • http://hotelbasantresidency.com/uploads/8098804781.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_off0000c581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC581 21160 bytes
SHA-256: c6f38ff4e2112ae723f29c2b4ffb78564f954cbdd3af6911ae881628867b8f34

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