Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d41ee5792eb5f66…

MALICIOUS

PDF

80.7 KB Created: 2021-09-05 14:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 02803aceddb444a806cce7dbce22d6e7 SHA-1: 8f7e28d2d600194ad450c14188478b23c366508b SHA-256: 0d41ee5792eb5f66590a05ad5f3a000bd5df98280b6f0a84380417536bab0862
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL analysis point to a link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e99b704adc---rotuzoriwirilenibobig.pdf In PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160775da2a7b40---33502252211.pdfIn PDF document text
    • https://dehayemek.net/upload/ckfinder/files/jodijoxupoxosaj.pdfIn PDF document text
    • http://a-b-i-s.net/layout/bilder/file/82362372861.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/d79338474b4f0e43ac44e6e004087e47/suvifujuzepirasewozeka.pdfIn PDF document text
    • http://ideatity.com/ckfinder/userfiles/files/22334934130.pdfIn PDF document text
    • https://ienter.bg/files/55703865656.pdfIn PDF document text
    • http://camberwelltaxi.com/survey/userfiles/files/19207782913.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/9381ce152c163835771cc637e1ca0d46/leresulativ.pdfIn PDF document text
    • https://defaico.com/d/files/zavagupadetosezuzoxiki.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a132c7bd615---75411178705.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b46f1ea7d43---mevajebinedulige.pdfIn PDF document text
    • http://boracayg.com/FileData/ckfinder/files/20210721_E2A44FF6A31D832B.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/88831335617.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/3bac1de941066863c130b3be6d49a1d1/gumuxosofeguta.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083cd6485721---kodovosiro.pdfIn PDF document text
    • https://oreopay57.com/ckfinder/userfiles/files/37801149592.pdfIn PDF document text
    • https://podgoricki-klub.me/userfiles/file/67480493023.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/kibukefuluvurore.pdfIn PDF document text
    • http://copingconversations.com/userfiles/file/tiwuvomaso.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/fefozeg.pdfIn PDF document text
    • http://joltiy.ru/uploads/files/nodeforokaxexudidu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=jurnal+hukum+perlindungan+anak+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94D 10740 bytes
SHA-256: dd26a7791bd0bcba7fd0031c03f629e7a0f687ea58af36330041262c3880e298
font_01_sfnt_off0000f175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF175 16732 bytes
SHA-256: 74dedb1fedccc5c3f7ceec9e895970bf4c93d26bb20de0b7bf5121b4f8d349c9
font_02_sfnt_off00011d0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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