Malicious PDF — malware analysis report

Static analysis result for SHA-256 5060a324a59a17d5…

MALICIOUS

PDF

80.9 KB Created: 2021-06-25 15:34:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9269df9a66efc9235c4d4e9662d4986f SHA-1: 60fd5919f1f0e4f22debe3201ed10ad6c08fed9f SHA-256: 5060a324a59a17d5707b5df7efa451cc9aeef9798879bcedcd9d86681a496c41
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://oniceh.ru/uplcv?utm_term=healthy+bmi+for+3+year+old
    • https://parokisantolukas.org/Uploads/userfiles/files/25140087965.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9132c281b---jiwanezopixawu.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a74a218f83d---50343782451.pdf
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/baf6f8afc08deb78905f2123252bd640/24718599207.pdf
    • http://111-orte.de/testarea/cwsCMSlight/media/files/vubidiraso.pdf
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/15719133934.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c60fd711d59---zufoletaditow.pdf
    • http://gianniarnaudo.com/userfiles/files/59778516013.pdf
    • https://tskrea.com/userfiles/file/legilawuvodepejogi.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/kh951lr0ucjik82pkomnoitm4j/44260434140.pdf
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/8ae57af25dae1c29f0929561e82bf1d6/26615567131.pdf
    • https://bursakaynak.com/userfiles/file/kopovegarove.pdf
    • http://ecohouse-lab.com/userfiles/file/kofazafevirodotigul.pdf
    • http://www.herbertvanderbrugghen.nl/draft/8427913711.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a32d5b33a7c---57171740566.pdf
    • http://robertoantoniz.com/resources/original/file/zimabumuburipubadu.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb73ef30cd---90947881913.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_off0000d75e.bin
4c74fdb51bda7a4ba92d0d9d5066be320e05e9682f1bd89ed90ea4a2ebc83d2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD75E 17252 bytes
font_01_sfnt_off000104bd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104BD 16792 bytes
font_02_sfnt_off00011cd4.bin
c416523d18551ad424a2848a98586b372d7392c483b3ce2cfcffbbad0169e36e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD4 10764 bytes

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