Malicious PDF — malware analysis report

Static analysis result for SHA-256 01be7349af148235…

MALICIOUS

PDF

79.5 KB Created: 2021-06-29 00:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 667f0d079d816c43df9158f2a169e32c SHA-1: 2c294f12b01d707469a23519574eed683b37677a SHA-256: 01be7349af148235c169ae7ac775f00f9f8c15615412423c6afa2bdc06ddb4a0
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicative of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and embedded URLs point to a common tactic of using documents to host malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://coretry.ru/uplcv?utm_term=another+word+for+assumption
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/c774a8d887c1de45b2ea26055044d9bb/gunesuf.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/s4drumeouv68ssbdg6f4tqlnlv/nakenafiriwe.pdf
    • https://netshopnepal.com/userfiles/file/duvuparetugot.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f2cc6a93c---88340556372.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095ee75006fe---61285836588.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/14076ff0d684f1c89f8e251e2ef55940/6723309361.pdf
    • https://akproauto.com/nbloom/fckuploads/file/35811825120.pdf
    • http://hyundailed.com/upload/editor/file/lozovazunuriwuzexeg.pdf
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/ldidtutq7ucut36i7ne53ccacj/8735655672.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1609c68740e897---kanobejusiberewerad.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/qmt1cclvsas1t5c8h1ng52flp1/wupizafulafiwusipozuv.pdf
    • http://mnogonomerov.ru/uploads/file/ziwozazeralatibuk.pdf
    • https://dock-levellers.com/upload/files/tujojoju.pdf
    • http://www.deopendeur.org/imgUser/file/30835631079.pdf
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/af3b91243787d60414169dcaf368a0e5/38417223022.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/b6534a91b6e180ca1fb64492521b08ac/43861031043.pdf
    • http://richmediahouse.com/admin/uploads/file/tiwigevutinigukezunekikeb.pdf
    • https://acryl-bg.com/userfiles/file/37170877335.pdf
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/5b497b7f40b9b86cf5ee581942789ec4/xapiraposesurotaxovowo.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3631a0e586---xugivozadewutufumaleru.pdf
    • http://mini-garden.ru/userfiles/file/80936986422.pdf
    • http://eventcompany.org/clients/e/e3/e30ef11cf4efe639fe6592aa37b9cb94/File/lobaduka.pdf
    • http://alituncer.com/userfiles/file/zejebowodolape.pdf
    • http://secretinvitation.net/images/files/79692295623.pdf
    • http://1982thsreunion.com/clients/a/a8/a85c6617a93da1462bf6c3e7dda9c043/File/tukibazukagonopijofamo.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3e06a062ef---mufatufurivoxitoki.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_off0000d431.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD431 16792 bytes
font_01_sfnt_off0000ec43.bin
aa2dcc9cde36f680c1246572b3fe1d7563c6e828c2196c506fba6348c53925e4
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC43 16688 bytes
font_02_sfnt_off00011799.bin
54dbeee41a1243b77248fc03059785dbf5a77e1afe35d051920aae14a9bf3f59
pdf-font-stream PDF embedded font (sfnt) at offset 0x11799 10884 bytes