Malicious PDF — malware analysis report

Static analysis result for SHA-256 0134d4f3981cf5a5…

MALICIOUS

PDF

80.0 KB Created: 2021-09-09 00:10:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a6aaca26a4003dc8b88244074a1242f4 SHA-1: 6e09c5d50efaab1fe671c53586f231c51d0834f1 SHA-256: 0134d4f3981cf5a54a89443be5070d46494e7f77bdbcfcf627c9fef247a2f135
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7261

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://robodom.si/files_vsebine/pumunaxozifizixatuti.pdf
    • https://evpersoneli.net/ev-personeli/file/zosizedexazojubetum.pdf
    • http://www.groupementpecheduloir.com/ckfinder/userfiles/files/janizarigupitunuzefu.pdf
    • http://dietaltop.com/userfiles/files/96803107170.pdf
    • http://domadoma.cz/userfiles/file/52636321.pdf
    • http://thenext.pk/userfiles/files/57692753222.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff2d83d35d---25424045262.pdf
    • http://whatdwellswithin.com/file/10430420854.pdf
    • http://mtsskzy.com/userfiles/file/84014098295.pdf
    • https://quangtriasianwindow.com/uploads/image/files/laxaxi.pdf
    • https://taipeitccia.org/CKEdit/upload/files/31611287718.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613925aa7c17d---jukerimig.pdf
    • http://evevoyance.fr/adh/.-/file/54650040649.pdf
    • https://textosl.com/upload/editor/file/48780316245.pdf
    • http://ricarda-allegra.de/userfiles/file/giredirinipamuwufud.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/dbde23b1c68958508613b8ff8199382d/doruwusumiposibadesave.pdf
    • http://eatoceanic.iorderfoods.com/uploads/files/65465740587.pdf
    • http://fsnmmaterials.com/UPFILE/userfiles/files/gisajevefepoligep.pdf
    • http://motovelo-nmsk.ru/userfiles/file/61209653735.pdf
    • https://trimix.bg/UserFiles/File/3224086317.pdf
    • https://mongolia-volkslift.com/uploads/files/51534753800.pdf
    • http://elfast.ru/userfiles/file/zelumazumemonozisitomupe.pdf
    • http://esistore.be/userfiles/file/72423820070.pdf
    • https://shieldtech.cz/ckfinder/userfiles/files/96698370418.pdf
    • http://arcomproltd.com/userfiles/file/40225119033.pdf
    • http://studiomistretta.com/userfiles/files/buwetujovuxujevekajidig.pdf
    • http://www.rannatennis.ee/data/upfiles/files/51418489342.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=watch+harry+potter+and+the+half+blood+prince+full+movie+online+free

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