Malicious PDF — malware analysis report

Static analysis result for SHA-256 046208dbd72b4ae9…

MALICIOUS

PDF

75.7 KB Created: 2021-09-19 10:36:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: db45e8c7ff72a665cb0c884c4981e910 SHA-1: fdfec59b0ba6769efd5c0e3e499c586b88d2b696 SHA-256: 046208dbd72b4ae95cad3ffa1112f92a9eb95c0de0353771145b621766810d2b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly support this assessment. The embedded JavaScript likely facilitates the redirection or further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://laiyi-art.com/userfiles/file/12592512863.pdf
    • http://autoachtercamper.nl/userfiles/file/14694139311.pdf
    • http://messtores.ca/fck_user_files/file/gitijirazepanefudasu.pdf
    • http://hawaii-resort.info/images/blog/file/metijepuwikabipodit.pdf
    • http://sjatupornservices.com/file_media/file_image/file/ledazezipevivir.pdf
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/22359741350.pdf
    • http://relaxzenter.com/uploads/files/kaxagugero.pdf
    • http://soles2walk.com/data/file/46089062402.pdf
    • http://eva.am/files/eb093c8660ac035e.pdf
    • http://poptheme.cn/uploadfile/files/20210918_095055.pdf
    • http://iltorg.ru/upload/file/59424245452.pdf
    • http://exoticland.bg/upload/files/files/zasodave.pdf
    • https://akamercedes.com/images/uploads/files/dowoforepitowu.pdf
    • https://indoshaolinkungfusociety.com/ckfinder/userfiles/files/fimegezekaximojajowag.pdf
    • https://medosojewellery.com/userfiles/files/83512575815.pdf
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/kijabivegoba.pdf
    • https://cooperadora.grupocreartel.com/documentos/archivos/65422923231.pdf
    • http://cosonhuath.com/hinhanh_fckeditor/file/2834191278.pdf
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/73508974146.pdf
    • http://caudafotografia.com/userfiles/files/nujazepixave.pdf
    • https://fsreloading.com/userfiles/files/61438049172.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/161356dc3cf57c---tuvawigimasixakuxix.pdf
    • http://aytekinpolatel.com/image/files/72847697792.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=californication+full+episodes+online
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf94.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF94 16792 bytes
font_01_sfnt_off0000d7ab.bin
218e99e14c24cdbf4d04b28bf3c6ff383874a44e51e85fe18e9b9fe4b6920521		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AB 10744 bytes
font_02_sfnt_off0000f07c.bin
466e978d0ec4a56b2c5ec8a794c9c8c0b015296256d30d09e158ab0b2155fe66		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF07C 18916 bytes

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