Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e583fe26be9046…

MALICIOUS

PDF

89.4 KB Created: 2021-06-26 08:37:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5316853fbdf71e577d7cd80674791019 SHA-1: e8c3b9d201fae085d50f3c40072ea6dbd452f97b SHA-256: 60e583fe26be90467c8a7fd64d8a1bb7c457b89a46b31660d9a20a03c03402f5
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other domains, likely intended to lead users to phishing pages or download further malicious content. The document body is heavily obfuscated and unreadable, providing no direct clues to its specific purpose beyond the embedded links.

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://chcial.ru/uplcv?utm_term=injection+and+leakage+in+economy
    • http://momsystem.ru/public/file/sulezomijavafazipujurofi.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/cc2f2ebc8a7c8a439474c640626260f3/56129385635.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/e89ouiu9cbud6c7egf3gfk2p90/guwemod.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e22838dd07---76159880664.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b46728e49f8---51359225962.pdf
    • https://jdlpartnerss.com/userfiles/file/jaxowi.pdf
    • http://assushop.com/userfiles/assushop.com/file/90071701648.pdf
    • http://studiobaliva.eu/userfiles/files/34264056831.pdf
    • https://fuchscars.com/wp-content/plugins/super-forms/uploads/php/files/e31508032a08be3838c566de93d4cc88/55826990922.pdf
    • https://prtl.pl/userfiles/file/wugereram.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/0pfl4q2su2eenr2ke4ph77vo76/tusadixupedodegeragi.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160cc4ae8888b8---12711526519.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/ugbnm4kloebes2l9bloskqj40l/jifalajubefuj.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/9e0c6c7c8e0e6bf760e71d0cb17b7e7f/waguwedibulotanadabenazez.pdf
    • http://constantemails.com/userfiles/file/162462637172154564903.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b42597e75---42555858256.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a33372258e---vunatazid.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160d64f40f29fd---66644690844.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9b799e076---69280439366.pdf
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/7d5e06a79f63010158e6954b8be0a401/kogetimidubibeguz.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d722f65db0---tosaxivagakazemozopaz.pdf
    • http://aarogyamedico.com/userfiles/file/fedozefuxos.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160910ea09c928---zanulepafiligivemebawune.pdf
    • http://bjjiffy.com/upload/57470846531.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_off0000fa0c.bin
4851598b518924c13ead36ba86b69b7fea72326934b6a8261b8e5df4069e5ff2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0C 10732 bytes
font_01_sfnt_off00011276.bin
f68a68d77a477264ed739143461a5b3bf72b34c6d935028fed0b7bc235ba6bf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11276 17460 bytes
font_02_sfnt_off0001403e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1403E 16792 bytes

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