Malicious PDF — malware analysis report

Static analysis result for SHA-256 67b4d126b66abad3…

MALICIOUS

PDF

92.6 KB Created: 2021-08-07 12:35:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7a150bd455ed8110128bffd65581d080 SHA-1: 49034d80f973b1aca8937a07ebd4ff9271763a4f SHA-256: 67b4d126b66abad3878b38c2c3aa9b76a60ae07ba28515e18ac4e810cbd7c9b9
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://pixomot.ru/uplcv?utm_term=structured+cabling+company+profile+pdf PDF link annotation
    • https://inverpalmas.site/aym_image/files/97665944061.pdfIn PDF document text
    • http://chobacgiang.net/webroot/img/files/sapusuvenuruve.pdfIn PDF document text
    • http://vce34.ru/attachments/file/31152236359.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/16093018e2ea10---risedisamanitiwu.pdfIn PDF document text
    • http://icwest78.com/clients/67591/File/wigitisoporevatozet.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/madakos.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/0c54a31bc9f64b7884d6a33548cf13d8/mafubizugokolugegodulin.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/773d07644363e88e3e291de3ac4e0357/puwoliv.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/nejemijizidabotofisupako.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/6mn1fkdnnbv81jl9tro81opoam/xakovagon.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/049811533f0627b7da22a453b400c3d5/6714867142.pdfIn PDF document text
    • http://ingmarcofaedi.com/userfiles/files/67954549071.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/b6975f63f683864e81ac23b1eeb076c2/55818567375.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6796eb788e---dufuwadesisunar.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff84a4e753---63800533113.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d2875ca12---xekakuzukejikabix.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b6427e413---49023665640.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/jufebopov.pdfIn PDF document text
    • http://tksvolga.ru/userfiles/file/2806834930.pdfIn PDF document text
    • http://arcadia1973reunion.com/clients/3/33/33cb7023d77084166ed027ca16b579b7/File/18126915513.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9ecd6fda2---vowamitewitisovepa.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099286a1ae72---vovarukolodudumowisuko.pdfIn PDF document text
    • http://solyaris.pro/admin/ckfinder/userfiles/files/feramixosiwokevupelotek.pdfIn 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://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_off00010082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10082 11224 bytes
SHA-256: ec624153ab23e02adebea582a1f55b44de3327c27d295eb8b5bdd56321b8ba0f
font_01_sfnt_off00011a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5D 18112 bytes
SHA-256: ed0a76e1c999cd95b45c30156cd843da3fae22d89619d65e6c36e0993082e3d7
font_02_sfnt_off00014a1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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