Malicious PDF — malware analysis report

Static analysis result for SHA-256 20e4827f6f20cb69…

MALICIOUS

PDF

40.8 KB Created: 2021-07-14 04:32:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: d62a3a0c30a0a6bf678dd5a91deaa8b8 SHA-1: 7a76307150bc04e51ff02c35965c48ea2eb971f9 SHA-256: 20e4827f6f20cb6992e6b9371699102f8afd0c3d18e4d549f9a212d04c74ff28
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8553

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 40 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://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b75f3ba0808---51660962150.pdf In PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2b840d3ca---7453691204.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/89516152738.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607294f4d713e---12749774481.pdfIn PDF document text
    • http://megaprestige.ru/uploads/files/vubid.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/b70624bd4bcd27c2e45847ad60bc1518/84455614779.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dec0d90a7dc---10843579754.pdfIn PDF document text
    • http://cbwmd.com/uploads/Files/wigenufuferawal.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/40399851362.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6adbc08ec---miviwukobotojo.pdfIn PDF document text
    • http://bryanhigh78.com/clients/72554/File/saxip.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210611_182434.pdfIn PDF document text
    • http://www.toptehnik.si/images/86313972590.pdfIn PDF document text
    • https://www.stjohnhomelessshelter.org/wp-content/plugins/super-forms/uploads/php/files/cddbaaf2cd34d0fc65f165bfa8e5023c/gelabesigusazejevo.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/06b55a37795430e46672b10c4472d1c0/31368529711.pdfIn PDF document text
    • https://menu2uplus.com/images/file/sodirexozakizinogut.pdfIn PDF document text
    • http://melly-incendie.fr/img_db/5735498417.pdfIn PDF document text
    • https://farmaciasacoor.com/site/upload/file/97960996408.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/0ae2ca9677f6d11c06517d237ff92c2e/solipobewopobamebav.pdfIn PDF document text
    • http://kme-kme.cz/files/file/bamabegotazas.pdfIn PDF document text
    • https://fallsplat.se/file/nijapuruxogubutigoku.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/ccb46f0a8bd9d13d072a6aa4bcd0bc69/xofogaxi.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/drof0hdb02u1hskehla2m9rb80In PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=endoscopic+submucosal+dissectionPDF link annotation

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