Malicious PDF — malware analysis report

Static analysis result for SHA-256 04f96220888e4bb3…

MALICIOUS

PDF

96.3 KB Created: 2021-09-15 18:23:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d97fa52e1a9112153371c5c22b67530e SHA-1: f0e61917e10fa798bc9f2bbcc7b204c3c50809ec SHA-256: 04f96220888e4bb3524a684abca984156a925604050a6d5bf821eb591ec31a50
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of numerous unknown URLs suggest a redirection or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lead the user to a compromised site or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://romangruszecki.com/uploaded/file/galogevukazewasomaxepavo.pdf
    • http://appartementslisa.it/an3_Uploads/file/diwenidofudaxusebabojiwol.pdf
    • http://maurovalleferroarchitetto.eu/userfiles/files/fekulobibawemaxemorufekad.pdf
    • http://bakefruit.com/uploads/files/202109102237586955.pdf
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/58966796023.pdf
    • https://equalitas.es/userfiles/file/dagevefulosiduxifetap.pdf
    • http://brukikostka.pl/uploads/page/file/78391242697.pdf
    • http://newabel.com/ckfinder/userfiles/files/xugepojixikuvan.pdf
    • http://nanumed.ro/uploads/files/nuxavojofozuvoses.pdf
    • http://classiccar-jp.com/js/upload/files/gumuzelisamofejukibuxid.pdf
    • https://maffart-guy.com/userfiles/file/52567735817.pdf
    • https://equantumconsulting.com/files/files/fidike.pdf
    • http://esipro.lu/userfiles/file/8837509150.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/64a7ffe28bb653c734ceca79a0b47e9b/piwigufugadotej.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16141b7a8caf7a---35843977456.pdf
    • http://ingegneriarossi.it/userfiles/files/13921390196.pdf
    • https://texasbordervolunteers.org/userfiles/file/10252874548.pdf
    • http://rlmlaw.com/images/edit_images/file/82070134253.pdf
    • https://impulsa.mantareys.net/uploads/plantillas/files/61825566876.pdf
    • https://delcinfo.ru/img/files/files/filogel.pdf
    • http://kiko168.com/UploadFile/file/20210905193414069.pdf
    • http://www.ufolep-69.com/contenus/files/wusawomagiv.pdf
    • https://rintrans.com/files/livoladewon.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=kannada+torrent+sites
    • https://mediaget.com/userfiles/files/42890197691.pdf
    • 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_off00011156.bin
be86a2fa0f8cbb14888f77330418e73a41d5ec9dfea6786908e7a08f8c2474f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11156 19744 bytes
font_01_sfnt_off00014513.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14513 16792 bytes
font_02_sfnt_off00015d2a.bin
1aed0673d83d69000a99f0e33ffcfb9ac2e98336db94d0a33ebeadccc9988642		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15D2A 10188 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.