Malicious PDF — malware analysis report

Static analysis result for SHA-256 04cf5720045e5b97…

MALICIOUS

PDF

92.2 KB Created: 2021-06-26 15:25:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2762de731b918c712c3e2b3fac5f749e SHA-1: 0401a5b6e295daba14dae4c87df64fdd23b5a719 SHA-256: 04cf5720045e5b971d1100831a4465b8ad3137b75ee79c25c6e65a3efd6a853d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, containing numerous URLs that point to compromised WordPress installations. These links likely serve as a lure to redirect users to malicious content or phishing sites, aligning with common phishing and exploitation tactics.

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://studio-september.com/wp-content/plugins/super-forms/uploads/php/files/2b8d89480ff03c0834ad175ae5488540/98064520939.pdf In PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/e797dace666daba0edfdabceb5cfdd47/mavogubilekewozolubojiva.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bb720068b1e---7430997703.pdfIn PDF document text
    • http://cs-golfclub.com/ckupload/files/63910942244.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/3b1ba012182910807e7b85cb618fbbe0/zosumolije.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/51303762448.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/97b81b69dc5ff46170ad0544e72a0a9c/84367914431.pdfIn PDF document text
    • http://wenxuezj.com/images/File/bidodobofekilopuruzaleru.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a521f8f30d4---nexugibofodudatirofolewu.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609c95e2bc69f---46447068921.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/38196901660.pdfIn PDF document text
    • https://morganmethod.com/ci/userfiles/files/1332654232.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/d5cc9c361c141805940c614c9a0bf333/tikugusobef.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16075d02acc74a---vigavegubitus.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16072d8c5ba3c8---60302764573.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/kekesabe.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/66e07258cafaee22b1d930d5bc131b86/fivuvuza.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8859188d5d---pubonegijekid.pdfIn PDF document text
    • http://jorkurojus.com/userfiles/file/36637711799.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/61069259553.pdfIn PDF document text
    • https://fairtradeportal.pl/userfiles/file/73528009728.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beeb4e14d08---18907075673.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/20140160475.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=easy+hand+embroidery+stitchesPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10794 16660 bytes
SHA-256: 24e1600dad82cb3d335a2c7355b408f23d2fe76a7b50e8488b390648d012502d
font_01_sfnt_off000132d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D0 10824 bytes
SHA-256: b8c45946aa32085bc1893706344808d7d1f00f5e7568339ac55fa51ad3f84023
font_02_sfnt_off00014b90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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