Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a6bf504cf718941…

MALICIOUS

PDF

78.1 KB Created: 2021-09-23 15:05:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d45b10a119085ff59125c5221268c83f SHA-1: c4bc8c616fef16912b6fc8230fa482c6f4c8ecc3 SHA-256: 4a6bf504cf71894152ec1549777cadc6421a14e25114b200a439a7bb8b379dd1
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating an attempt to redirect users to malicious websites. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or malware distribution campaign. The presence of a link farm on compromised CMS upload storage further supports this, as these are often used to host malicious files or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3795

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=jeremy+silman+complete+endgame+course+pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16130dd6695859---nojimujagefibeba.pdf
    • https://thuaphatlaihoanghuy.com/uploads/files/69397730449.pdf
    • http://lauraestetica.com/userfiles/files/mozufudatavipuwik.pdf
    • http://thechelseaff.com/user_uploads/files/namesuw.pdf
    • https://doosradashak.in/ci/userfiles/files/rifijubabamuwumos.pdf
    • http://phubozena.pl/userfiles/file/33763365590.pdf
    • http://aviapartner.biz/js/ckfinder/userfiles/files/20820023568.pdf
    • http://nairmobilya.com/userfiles/file/99632453500.pdf
    • http://precisao.org/files/files/miriwep.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16138ac1064a7d---81037905020.pdf
    • http://dmkert.hu/files/file/dakomejapifizikuwijefe.pdf
    • http://telegid.tv/userfiles/files/19234920590.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/86d1ee080d83d5d550e452bcaa97b133/34075662841.pdf
    • http://getsolarnj.com/userfiles/file/loperuzatarulofovo.pdf
    • http://lindseyderence.com/userfiles/files/mejutatujusilawafuz.pdf
    • http://amandamaitland.com/images/file/43433681755.pdf
    • https://hotelpancharatna.com/assets/userfiles/files/kizumivorilekip.pdf
    • https://www.educationsexuelle-ecole.ch/ck/ckfinder/userfiles/files/49316299985.pdf
    • http://dungcumaymoc.com/Images_upload/files/najobodejoja.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/53ad9ee5264ed4e6437d65f94da35562/riwirajukip.pdf
    • https://doluhosting.com/calisma2/files/uploads/valerowefevab.pdf
    • http://yas-center.ru/userfiles/file/zuradujudilaz.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b022b72eb4---wexeruwobamosugebadil.pdf
    • http://studioaeditecne.it/userfiles/file/50341002098.pdf
    • http://inspiredindianfoundation.org/uploads/14413057601.pdf
    • https://zniczekowalczyk.com/user_images/file/pujekapugomofamapaw.pdf
    • http://abdon.madteam.net/ckfinder/userfiles/files/momurodudezolanawalekek.pdf

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