Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e665116992a7750…

MALICIOUS

PDF

46.8 KB Created: 2021-09-27 16:52:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 102b8850c5b71602d575e308c2e29960 SHA-1: edfe4c945001a1b3be301e9b2a5fb28a6d194b2f SHA-256: 5e665116992a7750e2df5e5aec1e60a882a68ad7d2ff7d00f41c7f9caad80ffd
174 Risk Score

Malware Insights

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

The PDF is identified as a phishing lure due to its small size and image-heavy content, typical of a screenshot designed to hide clickable actions. It contains numerous links pointing to compromised websites, including WordPress uploads, which likely serve as landing pages for further malicious activity. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6441

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 46 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 https://ketchas.ru/uplcv?utm_term=top+ringtones+for+android+free+download PDF link annotation
    • http://fueandhair.com/userfiles/files/libubomitewo.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/16144ba023c8cf---porosomopufepel.pdfIn PDF document text
    • https://mycocoa.org/images/upload/files/24271147359.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f116dcfe5e---35258441147.pdfIn PDF document text
    • http://tylincms.com/userfiles/files/vutudikiwikexazu.pdfIn PDF document text
    • https://soechi.com/userfiles/file/mixesemerizalefozarabol.pdfIn PDF document text
    • https://nodka.eu/ckeditor/ckfinder/userfiles/files/nulid.pdfIn PDF document text
    • https://www.ijestr.com/ckfinder/userfiles/files/16662569545.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/5901179160.pdfIn PDF document text
    • http://cieplej.pl/imgturysta/file/panijin.pdfIn PDF document text
    • http://gonvvama.net/filespath/files/20210914035505.pdfIn PDF document text
    • http://abwrva.com/uploads/files/31728599742.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/6fea526e09083cb5f83bca1f76a0b652/vamevevifodigubetu.pdfIn PDF document text
    • https://halead.com/uploadfile/1631084149.pdfIn PDF document text
    • http://rfinshaat.az/userfiles/file/zamekusaperopagezamo.pdfIn PDF document text
    • http://skia22.ru/pic/file/rexudizufokojitapil.pdfIn PDF document text
    • https://waxparadise.pl/userfiles/file/79772218435.pdfIn PDF document text
    • http://mackits.eu/image/butamatedaravumaninajito.pdfIn PDF document text
    • http://nobody-films.com/bpms/includes/fckeditor_uploads/userfiles/file/pobifesiziveg.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/e3a0bab0d3075aa3756e5a292e5ea5e3/54826420384.pdfIn PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/17751588309.pdfIn PDF document text
    • https://bhopalliteraturefestival.com/mpsdp/uploads/files/93952700292.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/lefeluj.pdfIn PDF document text
    • http://levant-tekstil.com/other_files/File/zulun.pdfIn PDF document text

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