Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fd2316e107004cf…

MALICIOUS

PDF

75.3 KB Created: 2021-06-13 01:00:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 76db188da18cd547f5216d057ec63b76 SHA-1: dc3ae83f45f26f503669bde52e54559f3acd5d38 SHA-256: 8fd2316e107004cfa5cfa5524ccf574d4b16cab4972817d441a510c26bfd3fd9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised CMS upload directories, suggesting it's part of a link farm designed to redirect users to malicious content, potentially disguised as a game download. The presence of multiple external URIs and compromised upload links strongly suggests an attempt to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://irlanc.ru/uplcv?utm_term=god+of+war+ghost+of+sparta+game+download+apk PDF link annotation
    • https://securityguardsupply.org/php/uploads/file/58400668605.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/28895d7e78c5dc4c9be030d812bae2d0/sokenafikuviroruputijip.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2121072f38---puwikanufedo.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/vukosuxoxo.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ddd79c910---dofedosogibasiz.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/13bd3786b65a6d11bd65614426966209/55310534112.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/47705431336.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/lp62a2n72curpd35at0l965cg0/65867960093.pdfIn PDF document text
    • https://charqueadaboavista.com.br/wp-content/plugins/super-forms/uploads/php/files/e14a8cd60517f9fbb72c8230a9064c15/nezezararofobip.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/r5anckvcacf0297tvhrpi25koi/bepowanibaju.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/a5cuedaju3unt4gch0fv4kn1l7/jegijalis.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/fd36f40lou4oj5qg4evva3dj2k/74220623911.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/pr1pok3vchln255siain7fgje4/bumiferejajujoxaj.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/egdqji14m5k4c54j6pvaba4292/23820761962.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/5d27740d6f6506e8e4b945e935b49eee/tawadadixom.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/67426593987.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/wuxawagaxerefexo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE753 5644 bytes
SHA-256: cad8d6f4a7a84d9a513cbf347830d361b924b7c2262e2bf927e17e42a5ce60fa
font_01_sfnt_off0000fa73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA73 10792 bytes
SHA-256: 678b7fc042c7b95c9cfd8e7835e18ba6aa0033002e634f41ad88da27faf06758

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