Malicious PDF — malware analysis report

Static analysis result for SHA-256 363117b69f1cc589…

MALICIOUS

PDF

92.2 KB Created: 2021-07-02 16:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7fe3f68f5dd149ea76c8ce6da1cdafb5 SHA-1: 89e4e0a02363bb68639035a2857da4506b2219c4 SHA-256: 363117b69f1cc589d123ee5744d81567bb1fedde460a9c9b58f28989f46d7fba
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV specifically identifying it as a phishing trojan. The document contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. No scripts were extracted, but the structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/33feb425c37dd856b8fc1d4373e954de/sedisixipamusuwevopenoro.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e941ad2cf8---bizufazixutunuber.pdf
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff4792f4e2---lixulerobexumenesu.pdf
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607adeef6fa75---kizotumijam.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/dbdeec8815775b3ae79c4855661e2fb9/27279731439.pdf
    • http://kingcraftviet.com/uploads/ckfinder/files/sasabigirexazowiwujelodu.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a6bbe2cce10---87753390097.pdf
    • http://walkofagesvt.org/clients/0/0e/0e42319052772b195a43ba3ede0f03e0/File/fivomibamaril.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcbc014831c---22804251376.pdf
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/3fb2d0ce1e8963e01b282abfcc7a36dc/93505923533.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dca4f85485---segazizomevixilevuweweki.pdf
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/33f01aac7cd0a107e59d00b35e329b4a/kemapuwiwonedemagaf.pdf
    • http://work4shop.cz/userfiles/file/walugazajekakaradozodux.pdf
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/36ies4nqmvp0sqspv894eipt26/40478992430.pdf
    • http://creativeindustries.ru/uploads/userfiles/file/65649955148.pdf
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/mgmhprii23vrhe9irsbhc2lp2q/wewarogobujavanadaj.pdf
    • https://clubslotalmatriche.com/calcas/file/59106820722.pdf
    • http://bigsvatcharasith.com/userfiles/file/87971876848.pdf
    • https://pjkconstruction.ca/images/file/87949835731.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a13960c0dd1---67007453186.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/bebac7e779a2a348d29506292682df2f/womisunigikixiwirogigo.pdf
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/af2132293c742a74351f702c528542f6/pudodipusatutebuvete.pdf
    • http://citra.cl/userfiles/file/papewinubudo.pdf
    • http://medi-sen.com/files/files/22137136682.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=use+command+prompt+for+advanced+troubleshooting
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ead2.bin
4ce70815a55d4a7ad2d44fbfdb1cd59d43e7b1617772990dc7ff8f256448160c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD2 16956 bytes
font_01_sfnt_off000103a1.bin
fe747fb865a885ec7c717338902e17a51df6375e20e68e0140ab761ac7c13740		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103A1 11380 bytes
font_02_sfnt_off00011dd2.bin
9ffaf7790f0a35c4a3a723f114f2b79828201b6c5ceb16148c8213126b1fbde7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD2 17060 bytes
font_03_sfnt_off00014a86.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14A86 16792 bytes

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