Malicious PDF — malware analysis report

Static analysis result for SHA-256 94f48ea14b6a5636…

MALICIOUS

PDF

240.8 KB Created: 2021-05-27 15:57:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c05ca3ee1c6425db6290af3f5effcf5c SHA-1: f883b13e9f46fe10443250a52a99dc3ee9d22b12 SHA-256: 94f48ea14b6a563617530831727bbec639926e10ef5969f05dc0138ea7fedb18
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous links pointing to compromised WordPress upload directories suggests a phishing or credential harvesting campaign. While no scripts were explicitly extracted, the PDF structure and link farm indicate it is designed to redirect users to malicious content, likely a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/66a65a05857f853f4b8e8e4ac4215554/46777913530.pdf
    • https://adepotcustom.com/UploadFiles/file/20210505080624144.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/71e9fb37d3122a213663316473d2a08a/57202719250.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ce273d8bd---95360590159.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f27f16a7bc---zalizifilu.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/e76bfb1908d09e101af4a9ef6bb2f393/8679537630.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160846de82d28b---jetemazopobeletedefotab.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077506a99a6e---29882179830.pdf
    • http://alemotta.com/resources/original/file/64454438022.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c67f07f1a8---nozimudoremabeduta.pdf
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/aedc343ec80093465d03358fd13f8fb4/939675708.pdf
    • http://aire-limpio.com/img/editor/file/4061587919.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/fc50469492521928873b095f85d298a3/83874296350.pdf
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607738165a501---10109717557.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c70071c66f---degedexilimuvatupodota.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/7fe08009b3f2fbf6725219677602577f/ritiwugixonopalugovi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=journeys+practice+book+grade+4+answer+key
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00036516.bin
d04e3bfeb6358b469c3051f1c3f4b0ca7771d7fd251bc80eed2e8e5c23b83ee7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x36516 5684 bytes
font_01_sfnt_off00037894.bin
f74a8621ca93b756ae2733f3c421125d51f57673551f5326fdcec03c26e31557		 pdf-font-stream PDF embedded font (sfnt) at offset 0x37894 4504 bytes
font_02_sfnt_off00038a13.bin
1604dc247deffc5328021711fafb65ad3b3a60b9ba524d4b9f1a72a93a5d15b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x38A13 12336 bytes

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