Malicious PDF — malware analysis report

Static analysis result for SHA-256 7690bb090b70cf01…

MALICIOUS

PDF

69.4 KB Created: 2021-09-28 13:06:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 7756dfafaee4fa2af05a86e3ea5b4db4 SHA-1: eef8e799cb9ef6c33e962296bb03bd57fb7c429d SHA-256: 7690bb090b70cf0185e5b36a598b8584595d057f1bee33574fb5a304b0d0dd53
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded links pointing to external websites, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farm characteristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://medvor.ru/uplcv?utm_term=9xflix+web+series PDF link annotation
    • http://vanprodukt.cz/UserFiles/File/lofubivodetadojo.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16150c33839a36---mewaxupeterudug.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/zeniwixemisupumog.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/64703065110.pdfIn PDF document text
    • http://kietminhrivet.com/upload/files/21956942390.pdfIn PDF document text
    • https://rumusjitu.com/contents/files/36596521155.pdfIn PDF document text
    • https://willes-gb.com/uploads/files/202109012220103840.pdfIn PDF document text
    • http://tyros-club.de/userfiles/file/63765652693.pdfIn PDF document text
    • https://gibidesign.com/fckfiles/file/44452995194.pdfIn PDF document text
    • https://spyboarcams.com/files/keluzuroton.pdfIn PDF document text
    • http://kbidc.kr/upload/editor/file/1632852552.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/73260516413.pdfIn PDF document text
    • http://land89.com/ckupload/files/69105245656.pdfIn PDF document text
    • http://uni-farm.pl/ckfinder/userfiles/files/80617460978.pdfIn PDF document text
    • https://bdprescription.com/ci/userfiles/files/4646542201.pdfIn PDF document text
    • http://mtcnx.com/upload/fckimagesfile/pokufotosowilejeti.pdfIn PDF document text
    • http://vdavloeren.be/userfiles/files/18729739176.pdfIn PDF document text
    • https://promise-land.com/upload/file/keleguvakoxodofizemaf.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/06c9e2d6a3afbdb808bfd8d67af39249/fukawipafev.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/65611404081.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/49888486791.pdfIn PDF document text
    • http://sgrdpandher.com/userfiles/file/dexevesolikorina.pdfIn PDF document text
    • http://chamdure.com/DATA/files/nezabosinorej.pdfIn PDF document text
    • http://iscelenie.info/files/file/50907532009.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB267 15456 bytes
SHA-256: 5aa11c1b60284d9ead4c867c9035d32783a9d91bb440f1c622a185a6fb46a78e
font_01_sfnt_off0000d94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94D 10124 bytes
SHA-256: 9186b3ef29b153ddf3af73a2bcc0933e0eaa937e780c921791beec60784ad46f
font_02_sfnt_off0000f01a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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