Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7709dcf2a0f0229…

MALICIOUS

PDF

118.3 KB Created: 2021-04-27 23:14:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7290b0d9dd529283cea2041123eb7cab SHA-1: ba5be3abfa55cefaa9c313b20c9f3107bf99eb1c SHA-256: e7709dcf2a0f022976a9b3869f26667b3831a60bc788b2ae30c0a0660b24ff43
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8516

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://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/ililm1r8cnj1aof10bq2b797jb/wabevegediporedawe.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/d412096f841b3b4300625900c9888c3d/rabakirub.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/59797060975b06ef78cb8d3a9a676654/vetanakux.pdf
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/rajsdtis6vnqbc3ghi1obli60u/jagupenibabiviloji.pdf
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4e152f026---lebikogobewole.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0c7e6c06c---xuniw.pdf
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/a903da4167380aed6ca6a0ffcca155be/dobilijutejetakadepewe.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/fjbrii9o9d7tjneeggf1ujdb34/detoluzaxak.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa0655eb99---94800191394.pdf
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/757c944769d613e83aafc60ea39d9ad0/8101742488.pdf
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/aa1r1v747km200isivt1rus27s/68028843703.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/3ea8ce27f2a83e8c9b44794eaa706ad5/gajoredivasunegijuvi.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1606cada4325eb---nofetadubefijaj.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16087df30c1cc1---zazovarademafoparo.pdf
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f765c111d1---84485974498.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e6c98e75a7---riwiguxenuva.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=group+discussion+topics+2018+with+answers
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000190a5.bin
802f511ab97c7459beda71ba6b5cdc2794e6301f48c848f5a6df609e86629cf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x190A5 5772 bytes
font_01_sfnt_off0001a466.bin
a5fdfec8b2fbe7c7a1deec03656e8a0ff5c7d58a450125d76c61275d03a56796		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A466 11112 bytes

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