Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9ad359ce754f139…

MALICIOUS

PDF

92.7 KB Created: 2021-07-03 07:41:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d78accd0d76bb193e7b661e875f3be39 SHA-1: c327289970c636c427c8de7a2884e2bd0588fa49 SHA-256: e9ad359ce754f13984fb86d2e9d3ea2a24083bc175bea100395f5e77823fef52
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories and other potentially untrusted hosting. The primary goal appears to be redirecting users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

Heuristics 6

  • 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
  • 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 https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/cf60bef38a7f2a70dda8b1abb5eac86f/xonow.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/50af554216360591fb55951dd6783d71/31731755974.pdf
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/d4je1d84a3gjvtifcj0o944sen/89944880911.pdf
    • http://studioboscono.it/userfiles/files/mupexuxoxolivuvapodifik.pdf
    • http://soupworld.de/upload/file/bibojukeduxofogo.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad88f310732---dafezozosivejimugu.pdf
    • https://vegan-eshop.cz/data/file/xijijoxedaxaku.pdf
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/ba2d04ddf4fe402777debf5608656414/rewuzizu.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8e1385107---welox.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/hq68k5d10mmtetc5lo30agf41g/pukadij.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa086a67c9f---samupukut.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6e1d407a4---giwunosuwewapubobevupep.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606d317a94863---2563453878.pdf
    • https://jahanchart.ir/data/files/file/lokodosuvap.pdf
    • http://tuttotop.com/userfiles/files/19452837743.pdf
    • http://zonazero.es/userfiles/file/42491449872.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/th59j6snisekfe4cp4vg15cdk5/vogol.pdf
    • https://aicpwdosaeast.com/ckfinder/userfiles/files/sodakosoguno.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cfaf6052e05---mukakujugeweku.pdf
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/843f53105757b12f6dac41887321a44a/27598001717.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4dd0bcabf---6045247651.pdf
    • http://urparitet.ru/admin/ckfinder/userfiles/files/80337281240.pdf
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074db877d053---77599749234.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/qhqmm621lrd9jfq5pjutha1hm7/namepodabunogenevew.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/1968c8f99f92721dec2cf501b9cebbee/19431431226.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/63chv51q16ng0rkq0thvhdn8gp/nafodivaniwijifipabi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=self+interview+for+job
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010686.bin
d58d7d27aef582918d34b7d73758b9cef282ae3a348f68ff3fd11d0ade2f5cbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10686 17956 bytes
font_01_sfnt_off000135f2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135F2 16792 bytes
font_02_sfnt_off00014e09.bin
2561aca0d372f7bd3ff6efccee1c7b11db1a4cbe0adcf837b8d3f64bddad5611		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E09 10372 bytes

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