Malicious PDF — malware analysis report

Static analysis result for SHA-256 c522b0cd121f86be…

MALICIOUS

PDF

70.7 KB Created: 2021-06-11 04:21:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 870bd7659251ed6e7f0e558fd582ea7a SHA-1: eecce522459fffffdffb32100403b85bf0398e66 SHA-256: c522b0cd121f86beab2dc211cf33f0521824aea6887089229bbccf5d0da328ae
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to compromised WordPress sites, suggesting a phishing or credential harvesting campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9571

Heuristics 5

  • 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.
  • 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://philabc.ru/uplcv?utm_term=beckett+grading+pop+report PDF link annotation
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077b9ac569f9---fovevobowe.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/7d9e00864384080b6b0a18e381222f14/89226267872.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/talidugimi.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/16132685716.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609f84dcb9552---35827875699.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/00opbj4tp9kiveqcelv3i1ec22/43477590889.pdfIn PDF document text
    • http://amdind.com/userfiles/file/36349766812.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/bb4e13593f26b779fccc726e2199de21/91842677544.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f61c325460---46757921125.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16075d58446a82---72998522681.pdfIn PDF document text
    • https://chinese-wall.tw/upload/files/14562740309.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d8a1afffe---mokoxodopazoxinimab.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/valusakidelusaxojakiw.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/cum1jiigao94hgnui41o7v8ofe/83130648908.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/b2087785776ff08c3f106f0e67d4cf1d/mumojix.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5fb3111818---93084530094.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/45aq9vij090q0d58hkmgr51qkq/85268992183.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/3222225affa2c45e0a959ca0327717bd/90346219729.pdfIn PDF document text
    • http://csc-028.com/userfiles/file/20210610025259_u7h0wb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0C 5144 bytes
SHA-256: 9748bb975e81d39a77bcfbf80e955a394e83bab9165d42da42d508265e260b45

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