Malicious PDF — malware analysis report

Static analysis result for SHA-256 07a952dd0be7b140…

MALICIOUS

PDF

55.6 KB Created: 2021-05-06 17:05:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7cea60e4a1d5cc74b977d772af6be23b SHA-1: b6c6b04f480579495e7b16310dd9a2cfad1fe177 SHA-256: 07a952dd0be7b140b050d659c05fffbdf6b3293ff34ccea4ccd45baa8796d387
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a link farm pointing to compromised CMS upload storage, suggesting it is part of a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate that this document is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9754

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://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/265975a2fd4c45902351bbec74cab698/73174089127.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/gpjf7f598lh07eqtsa45vahcbv/bijepupamoxudesadalexoz.pdf
    • https://alutat.com/data/file/wiperedugekidumisesoxu.pdf
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/aa26756bbc1d917d90ddb3e8f1c9f3a0/tatagamowelafarese.pdf
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/g9e6gii3ut2h02k1fp34f44e1h/jafubemawopotisibekolir.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607375ed90b09---xaxiguwusiluvenapibitigu.pdf
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/gh721pc8h1t3cqv030fq89d9q9/zubapo.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/s75erqk1vjarcomkvvjtabsqsc/94083460586.pdf
    • http://asokmontridental.com/userfiles/file/61776885929.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/72209fe31dc020f3fd3e123d5919ff71/74539072687.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d6aef0617---47079140296.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb5693d897---wazejuzegozopivoxitaxase.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/rtu02jj5d69d8itco481n3c00c/34280318973.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071753c11aba---27740921667.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/4c27d9075e604ddb64b50d97f31cd920/99121838474.pdf
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/255e91c0154240d9bf42a08c4c1b8e19/letuzevogejavopixowexom.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9d9d4de774c5d338ac605f1258d7e927/sevamaburufutitagogan.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=excel+vba+set+sheet+variable
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdb4.bin
9c0896054c0a24997986801bde512d8d77de411f899b3bf4bcf4aa7d8c67ddab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDB4 5112 bytes

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