Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df2a350d472a033…

MALICIOUS

PDF

79.1 KB Created: 2021-08-06 12:31:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0bf33812ac8e2eb306c2f7e624f9ffb2 SHA-1: 13ecd4244bf0e3bbeee4548e94ec4b7957abfa17 SHA-256: 6df2a350d472a033c88a798ca815deeee9d5cad3a1f62a6ce8358543424ce115
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS platforms. The presence of these links suggests a phishing or malicious redirection attempt, likely intended to lure users to malicious content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=motor+driver+circuit+pdf PDF link annotation
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/14459728693.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/aa638a88265ab50c457bdff31fa344ab/xevotiludepugojak.pdfIn PDF document text
    • http://xaydunglenguyen.vn/upload/files/fc604c.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/44881038086.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/e5710ff8c4d0c5ee76c007bbd6c1523a/70627654915.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/7nqq84keovsqjbk8oh7oqilomi/72736848577.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/mawuzupudojabilo.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/d7675b3538f0ccb458c58b5c97d71365/26405403578.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/mikedipofufibefobasifuda.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/d075f04hak8j2phtaar0ivdvdk/tivomuso.pdfIn PDF document text
    • https://jmtours.co/aym_image/files/22667173463.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/44983742822.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b885d6dff54---goriwofagojix.pdfIn PDF document text
    • http://bioscipublisher.com/files/upfiles/file/sulabugubot.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/denapevut.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/64220127425.pdfIn PDF document text
    • http://greenbiotech.vn/uploads/userfiles/file/42654825215.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fbd45b9f4ac---31249653874.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd7ef886dce---kobozasagefoxopojexuk.pdfIn PDF document text
    • http://stroi-sistema.ru/img/dorojimiwoxewolukig.pdfIn PDF document text
    • http://tylincms.com/userfiles/files/32766654866.pdfIn PDF document text
    • http://eastbrunswickliving.com/clients/77672/File/tiwikepezenedisi.pdfIn PDF document text
    • http://shavers-boles.com/clients/7/73/73b1ad2e2c85410b7b015c0c79a6caf4/File/96969177116.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/ddfd760c7edff6bb29657dc298882a26/98665972850.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/o7lj9q68nok08dhrjtiqnvats9/xonipanubonadaget.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/a419a743c6fdd0bfa409faf821c2b70c/xaketibujuxiwulo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD454 10292 bytes
SHA-256: c050ca7db26ab32657ec9fff3967888954fb71ffac9128527aef41e35cfad193
font_01_sfnt_off0000eba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000103b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B4 16420 bytes
SHA-256: b92ad41b8c0cc103453653d1c08677029e7376e1b5ff2689a7b3b2b106a01629