Malicious PDF — malware analysis report

Static analysis result for SHA-256 96495c6ed8cf672c…

MALICIOUS

PDF

74.1 KB Created: 2021-09-19 18:33:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7b5c2fec0bd8c109c1d7cf8c8fb47b48 SHA-1: 93d4309f68db8938e31b2824e6eea16969ea149f SHA-256: 96495c6ed8cf672cb4d0688e1b33dd37c6d43329d71fb52352f3988c9af6989d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable hosting and are structured as link farms, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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=classical+dynamics+of+particles+and+systems+5th+edition+solutions+pdf PDF link annotation
    • https://banghenails.com/upload/file/5099207473.pdfIn PDF document text
    • http://cisseo.net/userfiles/files/38547234616.pdfIn PDF document text
    • http://sgrappresentanze.eu/userfiles/files/lorozepidufemalawagap.pdfIn PDF document text
    • http://cautrucpalang.vn/webroot/img/files/94100064512.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613828687f7d5---jezavimipurizoze.pdfIn PDF document text
    • https://cargotavio.ru/files/file/64909245883.pdfIn PDF document text
    • http://balone.net/_upload/file///totawipuwuzoniwi.pdfIn PDF document text
    • http://sartoriaventurini.com/userfiles/files/teguxidavuzijal.pdfIn PDF document text
    • https://godahoian.com/app/webroot/upload/files/rasabakukurokuda.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/doxupipenupifexubekulunop.pdfIn PDF document text
    • http://autoscuolauniversale.it/userfiles/files/geketezoligamakujejeb.pdfIn PDF document text
    • http://sindikat777.ru/ckeditor/ckfinder/core/connector/php/uploads/files/77024481284.pdfIn PDF document text
    • https://zniczekowalczyk.com/user_images/file/zewejodebodalipelurokefaf.pdfIn PDF document text
    • http://www.ags-sib.ru/ckfinder/userfiles/files/doxitomo.pdfIn PDF document text
    • http://dreamsurgerycn.com/ckupload/files/96964006725.pdfIn PDF document text
    • https://portugaliaimagyarok.com/ckfinder/userfiles/files/85069552751.pdfIn PDF document text
    • http://rilta.net/userfiles/files/xasakizijoxupa.pdfIn PDF document text
    • http://www.taxivanclass.com/uploads/ckfinder/files/nubixijedewalokaresirir.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/lufovapiripemef.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/safutozopatijoba.pdfIn PDF document text
    • http://qdjshg.com/files/file/buwuvogoj.pdfIn PDF document text
    • https://mobisteelegypt.net/userfiles/file/kenefaxakedozibibewidolux.pdfIn PDF document text
    • http://gospelpour100voix.com/fichiers/newsletter/file/towozeb.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/limezawumofizexedizep.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_off0000bd39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD39 15692 bytes
SHA-256: 72f129bf0811d85eca77ae1b0cd1b7ed43c8518b6dd38371cd03dce41513426e
font_01_sfnt_off0000e566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE566 11264 bytes
SHA-256: ef330cd54ac2a98ae3f709d94a623b875be0a28f6ed3a1975cc99ed68e6fc4da
font_02_sfnt_off0000ffb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1