Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbe342759e88c563…

MALICIOUS

PDF

61.6 KB Created: 2021-10-10 06:45:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 6910d55d56c04f29cc2b3cfe5fac2469 SHA-1: f242be8ecc01a734697549098f4989467e4cdece SHA-256: fbe342759e88c563eaf8158b91787db3fba71ba458b0ea06fa8fe502a8f8f981
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to external domains, suggesting it acts as a downloader or redirector. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm strategy, often used for SEO poisoning or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8187

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://infrive.ru/uplcv?utm_term=how+much+minced+garlic+is+1+clove PDF link annotation
    • http://big-blue-bus.com/pics/fotos/1/file/wetijavej.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/gagefipotemapi.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1615cbab33d38b---42408995704.pdfIn PDF document text
    • http://whitedwarf.ru/public/images/ckfinder/files/79524099578.pdfIn PDF document text
    • http://sun-green.be/ckfinder/userfiles/files/30663306698.pdfIn PDF document text
    • http://sk-uralstroy.ru/uploads/files/86511507963.pdfIn PDF document text
    • https://mailing.crpm.ch/ck/ckfinder/userfiles/files/nalikudifosapitus.pdfIn PDF document text
    • http://defhjdr.friend-match.com/upload/files/zaxotitaruzosexukelevenol.pdfIn PDF document text
    • https://avistravel.activsport.ro/userfiles/file/53971396749.pdfIn PDF document text
    • http://aesg2edcv.handylover.com/upload/files/7161337769.pdfIn PDF document text
    • https://lyna-garage.lynacarrental.com/htdocs/cljr/data/files/tenukuvu.pdfIn PDF document text
    • http://embeddedhr.com/ckfinder/userfiles/files/5251801745.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/4065445292.pdfIn PDF document text
    • https://aaaxxion.info/images/file/63155172276.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/64891233761.pdfIn PDF document text
    • https://wheelmartthailand.com/image/upload/File/furejimibadomedubinegiler.pdfIn PDF document text
    • https://gilbertems.com/videos/file/gigazigaji.pdfIn PDF document text
    • https://waxparadise.pl/userfiles/file/remiko.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/99252770033.pdfIn PDF document text
    • http://kleinschadenexperte.de/userfiles/file/midudezewo.pdfIn PDF document text
    • http://lawngo.net/fckfiles/kaxagev.pdfIn PDF document text
    • https://eurochen.com/UpFiles/WebEditorFiles/file/xowebaxozigo.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/femizisidimevafu.pdfIn PDF document text
    • http://madveras.com/ckfinder/userfiles/files/navanetizikaj.pdfIn PDF document text
    • https://petribax.nl/userfiles/file/mitibixukuxenupakor.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_off0000d964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD964 11016 bytes
SHA-256: cc7fd95f393393cd6232def63fa1781530bec63b9401558aedf9bb736d070397

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