Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bb3d4a285cd9b71…

MALICIOUS

PDF

39.7 KB Created: 2021-06-15 12:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8413088d17b194de8e0cf4f03ee503f2 SHA-1: c4b6f2e2a11de6ad4928ce743171ace0f0f6b92c SHA-256: 3bb3d4a285cd9b7110bb275c5bd3a3df8eab2e605131577736e42a5b5ef8dacf
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains an image-only facade with clickable external links, designed to redirect users to potentially malicious websites. The presence of multiple URLs hosted on compromised CMS upload directories suggests a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7780

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 39 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://pixomot.ru/uplcv?utm_term=bucklands+witchcraft+pdf PDF link annotation
    • http://brezov-gaj.si/uporabnik/file/85895270583.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607114cb62188---ruwavazajojazawo.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/18evef1211smhieraiu53pabd5/7797106384.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/31f9499de02d0c181303e7ba67237a3b/12288865928.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082de6d3a1b8---53165837577.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff200e6321---75091720411.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/224a20052b3d6199ea76e53a1f327706/61357116899.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/83221c50dbe7cced9947851de4b58088/95816430389.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/25d2f4bdb2c7a4dfda6faec795960adb/murevosasiwelonale.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd2cf5c1a70---xedotoditidasevatelos.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/gopabatimuba.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/0d23642bb49a3893a7ede64e31239c79/61574455279.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16099f2a32a01b---luxafonujofaradamarezo.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/3b7e0372282d9f94cde3b1dc7de04445/7746517578.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/jodibas.pdfIn PDF document text
    • https://bamor.org/userfiles/file/zoganaxukolulufidezov.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1e79dfafc---lavene.pdfIn PDF document text

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