Malicious PDF — malware analysis report

Static analysis result for SHA-256 6415743415accca1…

MALICIOUS

PDF

86.1 KB Created: 2021-07-06 23:34:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 24db88bb677fa018974d66ec7aa51ee3 SHA-1: e1974d0b0f213c9e2f2fac4b5fcd97508a767f85 SHA-256: 6415743415accca1ae4cc3a1ac3a5d59b584ad7c93def7c347e9eb0c00a4c8c9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://infrive.ru/uplcv?utm_term=can+you+be+punished+twice+for+the+same+crime
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/09f81ed4cc3ac235c3636ad52a20ad69/pifupux.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608af9a0c775d---bebotawanezunonodalogibum.pdf
    • https://brothers-music.com/ckfinder/userfiles/files/99114386442.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bafbc6babe6---soremovalotuvadirekob.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c119a9714---13049789582.pdf
    • https://nacionalequipamentos.com/ckeditor/uploads/files/kabokaropiwedujikebuve.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/5162107cfaa0c344fd9c5c8ee1485ed2/baluvimaxipakajo.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb722e8895f---94239618241.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/mvtsoor81htsq7cji3u5v0jm89/zopelamud.pdf
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/21994801e5c478b636873d51af45719c/13971388062.pdf
    • http://seabeachthailand.com/UserFiles/file/jokolunatanuxazesuri.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/hfeajlghqovja0ra0uii3eobis/fubojizi.pdf
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/cqk9jti1e21fe35bn0ie7p3dm6/munifonawopovozodomavivak.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d3ef5e06043---zipiwesaguxixotef.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754c9e1745d---gibufiboje.pdf
    • http://hopkinshigh1961.com/clients/878968/File/welujan.pdf
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d914581f1---gejoxuwigerefogavupuju.pdf
    • http://clean-ecology.com/Upload/files/42574388725.pdf
    • https://rintrans.com/files/rawomodudegafuseputebowa.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/c24ccc523fa098c2dc247be5abd5db4f/57497494969.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/4161ltc0rguu5vmqfr58d7davp/potakodot.pdf
    • http://dermalab.pl/userfiles/file/71738540813.pdf
    • http://babywagen24.de/userfiles/file/79572385859.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8019982c6e---42057998364.pdf
    • 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_off0000ecde.bin
4709937b9938b16400925249ff1f8d4c3785b6158646fd2c0f28481169d5934e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECDE 11308 bytes
font_01_sfnt_off00010722.bin
3d0eee50265f6931ea1a14058a8cd42d28b7f06d62beac9c8e8aae5546195ff8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10722 16996 bytes
font_02_sfnt_off0001329d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1329D 16792 bytes

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