Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bf083debb241303…

MALICIOUS

PDF

70.3 KB Created: 2021-08-06 08:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5d8c051dd06281e9d401ab0f009283d5 SHA-1: 838ffaa5c0e8b789658bfe149d5cb42297cb8e1f SHA-256: 6bf083debb2413030da876481c3181107a0238cf0bfa46d9d411cdf115cb04f2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting. The heuristic firings indicate it functions as a link farm, likely intended to redirect users to malicious content or phishing pages. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8021

Heuristics 5

  • 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
  • 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://catamma.ru/uplcv?utm_term=simple+auto+clicker+download PDF link annotation
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/6pscqekqausmkamnmt56d5jpi2/rajaxamekitup.pdfIn PDF document text
    • http://edwardlankin.com/clients/86087/File/90271106913.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/ed82006528d010f49916eb43bb35f046/wudokirixeji.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/4d0df0ce4b8e12f81ba76371a52b9761/puradato.pdfIn PDF document text
    • http://eventcompany.org/clients/e/e3/e30ef11cf4efe639fe6592aa37b9cb94/File/35208308021.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a7933f2c3---34084301526.pdfIn PDF document text
    • http://hotelclinton.it/userfiles/files/42626419758.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/d1b11adecc3aef18d98c294ddd4a38ed/90023256570.pdfIn PDF document text
    • http://www.northern-japan.com/image/upload/File/visezude.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/79f187e14facefe2b6dd376eec9c3434/96781309692.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/50361510744.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160efe5c636ac6---misisuzu.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a856165f646---gugajajuxiwixejajexojux.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/9a5c0fa0b4726b95c928766c28f5b1ff/35701240442.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6c85c4d7f3---nosonaduxesopukuxewina.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/a1b8326b74b05df3d2981a8f714de393/64845537275.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/lawagibi.pdfIn PDF document text
    • http://www.ciesol.es/ckfinder/userfiles/files/sazoxoxus.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/9d2a61f5b606c79df2e908e88a35f7af/xutavopogov.pdfIn PDF document text
    • http://vaonhaphatphap.com/images/uploads/files/maluvuxikedibu.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/9qehmn6pv9o99kdtvteln7f8c5/85122651797.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e35d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35D 16680 bytes
SHA-256: 6bc5b42f6135e1b09debef1333242baa3a19b2467efb1e9cb47ac6ae69bc684f

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