Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa252af7277b95f…

MALICIOUS

PDF

64.0 KB Created: 2021-05-05 05:44:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70994ec76d61cc27297c10131a9e3451 SHA-1: d3c95ce3717c0e7567c8b999479fdbce5473a2bf SHA-256: 6fa252af7277b95f8649d4f82287c9d55574e4801a1fb81ec5fc140accfcea1d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution via these compromised hosts. No scripts were extracted, and the document body was heavily truncated and unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8681

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d2c19e441---48253910095.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/sd290p9b48viterrcmkqjg9648/51516959348.pdf
    • https://chp-travel.ir/data/file/51755594064.pdf
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/d4e609a379e74e06ee9d19c44e2b8755/butepugitutozi.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16081e6ec3d348---25650415641.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1a06316b7---wetosepoti.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077abeeaba33---33721365347.pdf
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/ccd74dde42fc7102f25233d2182cba1b/dozumobegege.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160772661a9583---50691568936.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e84b22211f---fimibexexifawelozibake.pdf
    • http://amadpich.com/userfiles/file/15047233041.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078d8b355f2a---wulijizuwofe.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/93c5feffccf68cb12e4980c94f5b78af/tewusonedufejat.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/51ca4f0dbabd6f59b6f4cf5db6e7e735/rukudepalagalijavivukaw.pdf
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/12c2a79cf9715cc433998a12a6d30c0e/javugotagatarunilubunuro.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160758c2088b06---57906826559.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=bike+background+images+hd+free
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4ce.bin
63e7d9486d0dc785348e8839aa1fb407e3119f7f756992013855a8440e58c741		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CE 5656 bytes

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