Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee6d79ea8c0000cb…

MALICIOUS

PDF

93.2 KB Created: 2021-07-02 01:18:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3f5465ed05e4f4150f83def722275183 SHA-1: ebde918449463bc0e2dd518f156d69f04bbbb248 SHA-256: ee6d79ea8c0000cbd92ab45220ff7bb61082ca3ddb1420ad203ae029ccb49089
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it is an advance-fee scam lure. It contains numerous links pointing to compromised websites, likely intended to redirect users to malicious content or phishing pages. The document's structure suggests it is a link farm designed to exploit SEO vulnerabilities on compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://synerhu.ru/uplcv?utm_term=tenancy+with+survivorship+means
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160887f67b8a73---5713767995.pdf
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a851d05f5c3---76345048797.pdf
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f32da29def---tanupukinole.pdf
    • http://technoculture.cz/admin/upload/file/wakuvopabe.pdf
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607b1ebc260df---51183513557.pdf
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/42042484289.pdf
    • http://614move.com/clients/4890/File/janof.pdf
    • http://naucseto.cz/storage/64094876834.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788ac9ecc50---33787301052.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4a86bf472---14228854778.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c15de8559f6---17876818472.pdf
    • http://gianphoiduyloimodel.com/Images_upload/files/74502075480.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16086d9dadefd0---4075961062.pdf
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/3608aed2bb36ae1b47a7e21d24f1aa94/495714715.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/bpesl9b5dkmlr4e94bh4pkrb1p/22210113064.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ef214d313---zatomiweforijef.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160724c0676468---73931586288.pdf
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/453b0ba9ba29a4b50e5a1006b5ebdefa/85935974997.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608796edda4fe---lebapovanirojekafix.pdf
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/eurb4dg6h6nb3s0icr9gg1srtm/38459403966.pdf
    • https://auto-rujo.com/images-editor/file/fogelutes.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/23lr49vb5aj1phkc74ecrouft8/rotarotajoxotulul.pdf
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/4ahgcqch1qvflt4a5ebcqamko7/peseriduvigagoja.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_off00010870.bin
ecc01c685e927235e4ad1608aa6ee47e48f82df2d6dc5f46cf0c530d34c28387
pdf-font-stream PDF embedded font (sfnt) at offset 0x10870 10920 bytes
font_01_sfnt_off000121b1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x121B1 16792 bytes
font_02_sfnt_off000139c3.bin
647115253bce6f90e540d2c95513a389c35e08a9fb11fedf9c7d57a09692b59e
pdf-font-stream PDF embedded font (sfnt) at offset 0x139C3 17476 bytes