Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b09eedca13b955e…

MALICIOUS

PDF

47.0 KB Created: 2021-09-04 03:36:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 809bec2a03cb690ee9704fb79fcb77fd SHA-1: d3b302c9b02b5364b9917bf1d03d529904e3526b SHA-256: 7b09eedca13b955ea722db841b0e32e6cdfbeeff1194f033e86a1a482f97a0ec
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is a common technique for executing malicious code. The sample also exhibits characteristics of a link farm, with multiple URLs pointing to compromised WordPress upload directories. These links likely serve as a distribution point for further malicious content or phishing lures. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9450

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160750c0b7b1c5---zuzitaniz.pdf In PDF document text
    • http://bakineshr.az/ckfinder/userfiles/files/7085367565.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af0433b594---33763608199.pdfIn PDF document text
    • https://www.chablis-gautherin.com/ckfinder/userfiles/files/sigulazumotedij.pdfIn PDF document text
    • http://spearsyounglegacy.com/clients/b/b2/b2c23f164518415ec8f3c1c8d0af542d/File/64876516090.pdfIn PDF document text
    • https://tnmkor.com/FileData/ckfinder/files/20210814_4E91ABFC1B0FBAEC.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c75d9c71831---pavetimimexeropoxolefuk.pdfIn PDF document text
    • http://www.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/89823954032.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c006c2f3b---63753591765.pdfIn PDF document text
    • http://seattleteriyaki3.com/uploads/files/24870385290.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/porilogavepekedaxunifaguk.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/vofosanedizoverewu.pdfIn PDF document text
    • http://lawngo.net/fckfiles/89962673618.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ebd608d8b---lowirosinexofulep.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abcb042b6a5---35871725119.pdfIn PDF document text
    • https://ataru.site/js/ckfinder/userfiles/files/89307516281.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f756b63541---2117841820.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/5dcfkpmn9ffipkp96jg90v5spu/43650802180.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/9b553a157f2c4208eba9736b3a645485/reruworesinofijovoxusepoz.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af86788d437---89011601723.pdfIn PDF document text
    • http://ovodatar.hu/userfiles/file/71119348623.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/2898ab9297ad2977cd8dfe74f452dd7d/80363517001.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=cessna+150+flight+manual+pdfPDF link annotation

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