Malicious PDF — malware analysis report

Static analysis result for SHA-256 38fa31f9c3099bed…

MALICIOUS

PDF

45.6 KB Created: 2021-06-28 21:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6472e1a9eb4ba34dfcefe5f4038713c7 SHA-1: 1846c28873fa6fde79fc4f86cb56e2c4e44b68be SHA-256: 38fa31f9c3099bedd4d220c20e3dd8e74fd2fda9d60b0035f82255cfa5cc945d
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing lure. It contains numerous links pointing to compromised CMS upload directories, suggesting an attempt to redirect users to malicious content or downloads. The document's structure, being image-heavy with minimal text, further supports its use as a deceptive phishing tool.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7407

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 45 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://agataklimowska.pl/userfiles/file/594050724.pdf
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16082c3bc0134a---46231495158.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/7ma51f1b2j0kd62pc6jgvsurl4/gakaronupom.pdf
    • http://travellightnepal.com/userfiles/file/roremog.pdf
    • http://zaun-produzent.de/userfiles/file/21599467905.pdf
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/60d7d148cfaee7c7af1413471858b1a7/49459137362.pdf
    • http://akcjonariusz.com/UserFiles/file/zakisevodopiwajonefogiki.pdf
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/ssohed0kdgtq7ji08ortu900cb/julevusuf.pdf
    • https://cuisinescartier.ca/upload/editor/file/pidaxodomedatililiva.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16092edda92247---mujiboxemaxewexeximamodop.pdf
    • http://france-ex.com/images/blog//file/mibonopevabekedidoles.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4105f8cfb5---matozomibumofiwo.pdf
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607fcf33d589f---94281375287.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607b929869f3e---49236234790.pdf
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/c516aa7c095a26833a55b94b5ed4a070/81289278149.pdf
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160abdd6fca03f---91207399941.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/25097763ec3e6e3af6b4e12643188bdc/dukosawol.pdf
    • http://liga-stf.ru/i/upload/files/wutamuvugonezoje.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/385015c932b042764e54c67788643f7f/madaxofovaguwab.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d0899f31dfe---16059363946.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adf04f8cf0b---fapufipop.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c218fd1f81e---fepemarabena.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b8a2952e2---moradivijubuxukarasudomu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=demographic+survey+meaning

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