Malicious PDF — malware analysis report

Static analysis result for SHA-256 c16c7c40abb010b7…

MALICIOUS

PDF

51.1 KB Created: 2021-09-04 14:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5ee2d425fdb7496cf380004f8777a070 SHA-1: 36ed2531b25389af960c1083d466fab850d3470e SHA-256: c16c7c40abb010b711b3c3f665e3907e1e109f9d1ca42b8d4bcf8a74a31b2f32
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised CMS uploads and disposable hosting. The primary purpose appears to be directing users to external, potentially malicious content, which is a common tactic for phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5824

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://pcparts.fr/ckfinder/userfiles/files/79659208427.pdf In PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/sf8eq9qjok93qdphvrq4cboc7o/jupomerijuxine.pdfIn PDF document text
    • http://arlingtonhigh1961.com/clients/e/ef/ef36f0800c0a5d5a0b00d5ecc8c3c6da/File/tidatibalideguges.pdfIn PDF document text
    • https://viscom.bg/uploads/wysiwyg/files/19619968812.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/e260eca7b2f41badb0e0842f802a6249/matuwuratozubiwid.pdfIn PDF document text
    • https://mongolia-volkslift.com/uploads/files/fatupisasupetixapi.pdfIn PDF document text
    • http://danburyhighclassof1961.com/clients/b/b4/b42d7d7907ff1a67dd6fd366dd3c6775/File/73681116503.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1609f32f6cf6e3---jozazijamidumekisarododu.pdfIn PDF document text
    • http://etoprosto.ru/ckfinder/userfiles/files/65145840592.pdfIn PDF document text
    • http://clerus.hu/files/file/72179001877.pdfIn PDF document text
    • http://lso-msm.fr/userfiles/file/getavupiviridutosujisas.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160882b1d31613---61698181690.pdfIn PDF document text
    • https://watosaphotography.com/app/webroot/userfiles/files/20210705_221348.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/22188586631.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/s1qvtsr98qufi95qsk5f85bhp8/gumuzu.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d23009331---sefowitugovegetef.pdfIn PDF document text
    • http://mariautonoleggiomarsala.it/userfiles/files/1777467157.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/nedomidobodug.pdfIn PDF document text
    • http://aaz.sk/editor_uploads/files/suzavorawesitotosuwa.pdfIn PDF document text
    • http://prosquash.by/data/83144541807.pdfIn PDF document text
    • http://cobe-ing.it/userfiles/files/84423225093.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ff492e585---40506653144.pdfIn PDF document text
    • http://cabini.it/userfiles/files/xofuzesoxukabiguwafubedon.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/316efaf9b0b471ffc43f9cc4b9d38c61/55763805840.pdfIn PDF document text
    • http://caramelitos.sk/files/potadinofefizevafo.pdfIn PDF document text
    • http://klm-co.ru/foto/ck/files/rozadenemigomopajiparorab.pdfIn PDF document text
    • http://luberoff.com/userfiles/file/sejenavakasevovezigowawuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=zelda+ocarina+of+time+official+strategy+guide+pdfPDF link annotation

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