Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d086e3eb456856c…

MALICIOUS

PDF

41.5 KB Created: 2021-09-04 00:33:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 27605e222af77c0b6689b4294e90c89d SHA-1: 297fc65487dcd43bb0c46325fabc7d25bb7a5f98 SHA-256: 3d086e3eb456856c7c226a5c89d2b629126bcebaf13b0c84b5af3183796fe289
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable links. Heuristics indicate it's a link farm hosted on disposable domains and potentially compromised CMS uploads, suggesting an attempt to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7328

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 41 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://thevale.us/userimages/gazotor.pdf In PDF document text
    • http://c-six.it/userfiles/files/94234139424.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a87e4e3ae2---86065888089.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/6496430055.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/161317b324ca5a---96772656757.pdfIn PDF document text
    • https://namlongadc.com/uploads/news/files/tofovofagu.pdfIn PDF document text
    • http://dorinhawear.com/admin/fckeditor/editor/filemanager/connectors/php/fckeditor/editor/filemanager/connectors/php/userfiles/file/xujonig.pdfIn PDF document text
    • https://godahoian.com/app/webroot/upload/files/winugusabepepep.pdfIn PDF document text
    • http://theofficeplus.com/userfiles/file/37914796635.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/bcl4o0if7amenre2didd831o8k/xokumovamubexutitosu.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/33896258281.pdfIn PDF document text
    • https://chambredhotes-savoie.com/ckfinder/userfiles/files/zamalovakukogexefi.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608050dd98458---30564118712.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8d5a555ea---69239275706.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/f05c11311c19752efa7fd96f8ce04d78/kavar.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757734bea61---90431741924.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608620bcbbe13---9937847660.pdfIn PDF document text
    • https://emmaushuis.org/pages/jewazuza.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/1969aa1cef3859330143c8f305d88274/tupokudeliwuzifakexobudo.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/logawuzewogugasoli.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c77ca263c88---35755576611.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/gezaxiwijusejomux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=java+tutorial+pdf+in+tamilPDF link annotation

Related samples 8

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