Malicious PDF — malware analysis report

Static analysis result for SHA-256 560b4ac2551075d7…

MALICIOUS

PDF

82.3 KB Created: 2021-08-05 19:34:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2faf31f4572e2d1199c9bf4b0e3f725e SHA-1: 3254ab9d4b8f13cf311f88c12eb4805f8a00cec3 SHA-256: 560b4ac2551075d7af3af5770c7215146c2df9c5f1379440ec5b38973c12bb01
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other potentially malicious content. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the nature of the link farm suggests an intent to redirect users to phishing sites or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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 http://dxqzx.com/ckfinder/userfiles/files/20210721_004737.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/51i8aqoeancvfhrrhn0c6urn26/78651590246.pdf
    • https://mccartha-cobb.com/userfiles/files/74683914156.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/bh5pu3h4e1cvvr71o7gddnkc9h/desoxobaxemanag.pdf
    • http://liddellgaryfamily.com/clients/863293/File/66868358459.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/aa7c889b0dca20f38f17bd67f2f5dccf/zukofozozivamit.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2fd3e5eb0---nubeguwirepamami.pdf
    • http://ekorob.pl/userfiles/file/22708482959.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160f23e3792b20---keverakunuxizedolo.pdf
    • http://gzmzwl.com/Uploadfiles/files/waverufu.pdf
    • https://alianzatours.com/imagenes/file/8061086082.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/b327cbcde79c103491d60cb6ce2e5d8c/94252059355.pdf
    • https://detskeihriska.eu/ckfinder/userfiles/files/zobobiletujorevene.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160755cf08f550---59116346414.pdf
    • http://mdbim.pl/ubezpiecz/obrazy/file/mejeli.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a2b26731c---fofupojowowawemetapug.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/36b74c95400e83b5b7eeb41ed64ebe2d/nijixet.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f181197e8---4143661468.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f2d7e6081---bewemosogitirefod.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608640dd61abd---12018078058.pdf
    • http://flightshop.jp/images/blog//file/75409211950.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160973ad1a9287---19718059701.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160973f0c9ec99---zegusojum.pdf
    • http://rialta.ie/userfiles/files/65893152537.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16085045ab695b---4948026236.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609169acb063d---nafikoferetoxaw.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/e3hro1vrp8963j8619uvp5fndd/89136511338.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/5313924d2f6d4eec56e40b9446ad6b72/povubokufolubuje.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=old+tamil+movie+songs+listen+online
    • 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_off0000de9a.bin
adfd2785f89788f602baa9603a0fee3dad6acf680e1dba4baa03d0fc06737daf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9A 17088 bytes
font_01_sfnt_off00010ab0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB0 16792 bytes
font_02_sfnt_off000122c7.bin
73b1bf74428758d93e96365481cea7d4c28d635a9646bcf53957314e4bd4aff1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122C7 10580 bytes

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