Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc602fe6ec26858a…

MALICIOUS

PDF

89.1 KB Created: 2021-06-27 18:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b5716371dd36cf376191de72b913eb88 SHA-1: 01cf8fb79c3742dc6b4741531cb1ad76537b269b SHA-256: bc602fe6ec26858aeee1763d1a2870c9d346230519387d3b30a3646b40523b62
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely serving as a distribution point for phishing or malware. The presence of external URIs and link farm heuristics strongly suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://infrive.ru/uplcv?utm_term=dish+network+channels+lineup+pdf
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/263d25fc018d12c7476c8a3954dc928f/jupifoloduwejow.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/424e60de2ccace690abcef8791c06c31/fufenejomikurimijel.pdf
    • http://naitikfashions.com/ckfinder/userfiles/files/zowetalad.pdf
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/5209ff0449cd1f520fc72534a82620bc/wopalapefo.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb60278598---19409378284.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/hdmhs6r58v1f4jau8gv72ku404/donigazusujurukikuvone.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//pewusasovefodulujomul.pdf
    • http://bronia.org/userfiles/file/napukuta.pdf
    • http://askort.pl/Upload/file/75227086091.pdf
    • https://gangnampools.com/contents//files/tabutawejenavubaniroki.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be866453105---tudewezaxaxudokosaw.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/ba90a3b285367fd09b5db8b76e9ade1b/73258751546.pdf
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/0v3v7rlskkn18820l81b7fqjf6/13078043142.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839ce103f5e---xitufopepuro.pdf
    • http://komputerzagrosze.pl/userfiles/file/44453754425.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/0460c45d63393dc8184d1ca1d8e10c05/50315005728.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767074e0907---naxedimem.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/6d2e18ed97ddc076f129f0eda37f37a5/dafekorojadupite.pdf
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/14f7b9952338cb5890bbb6aa4a8c5db5/vesizulolojidenufodixobi.pdf
    • http://vladjurnalist.ru/archive/file/17615534346.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/258cc4e1ecba1ad7efc2509749b6a16d/pamivod.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c8602de05---16560024593.pdf
    • http://kulturazebrak.cz/userfiles/bumositoguwi.pdf
    • http://all-pass.com/folder/editor/file/totusuxezanowukijerub.pdf
    • http://cleangroupbd.com/ck/upload/files/45083957972.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_off0000f5fb.bin
50cd33a716daf00606eb341b9349b822270b39ad3c9302e7b3686645b3fb60a3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FB 17672 bytes
font_01_sfnt_off000123de.bin
4d545665f8bd701ba0b5279171e3254e99e9dd84b35067fa7c5a0ce4b9673953
pdf-font-stream PDF embedded font (sfnt) at offset 0x123DE 10996 bytes
font_02_sfnt_off00013d71.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D71 16792 bytes