Malicious PDF — malware analysis report

Static analysis result for SHA-256 df29b984d20fada2…

MALICIOUS

PDF

86.5 KB Created: 2021-09-11 03:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b3517cb1fc414ae9efa20995ec5cae19 SHA-1: d96d9aa86ad1be951dc77678ec6eb3f6dbf99b85 SHA-256: df29b984d20fada288d9408bf7ed8278d5601a32f584ff2658390e49e62d4bf0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The high number of external links, many pointing to disposable domains, suggests a link farm or phishing lure designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://morpheus-architects.com/file_media/file_image/file/dosoloboduvejekopox.pdf In PDF document text
    • http://permagnet.com/upload_files/file/210902024724792870edemgu.pdfIn PDF document text
    • http://autosvanbeek.nl/mindcms/js/ckf/userfiles/files/56041812646.pdfIn PDF document text
    • http://simonkuehner.de/gfx/userfiles/files/viritelojetefire.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/60059162279.pdfIn PDF document text
    • https://castilloexterior.es/ckfinder/userfiles/files/73191521823.pdfIn PDF document text
    • http://montpellier-business-plan.fr/mbp/upload/images/images/upload/ckfinder/pupumogamugabebosifij.pdfIn PDF document text
    • http://caudafotografia.com/userfiles/files/14015558264.pdfIn PDF document text
    • https://demo.wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/12016568078.pdfIn PDF document text
    • http://nagakuratrading.com/js/upload/files/xijopo.pdfIn PDF document text
    • http://karthikeyanjayaram.com/userfiles/file/vujupunawipaxejor.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///jukurixokegowopod.pdfIn PDF document text
    • http://www.de.ruben.pl/ckfinder/userfiles/files/36801097497.pdfIn PDF document text
    • https://0800-707-808.com/upload/ckfinder_temp/files/20210901055353.pdfIn PDF document text
    • http://bluecreator.biz/ckfinder/userfiles/files/76316933535.pdfIn PDF document text
    • http://waterlootour.com/FileData/ckfinder/files/20210907_2617802AFFCA9378.pdfIn PDF document text
    • http://solarwindependence.com/ckfinder/userfiles/files/kizugaritirumajafaninabi.pdfIn PDF document text
    • https://melz-feu.ru/upload/zorowigekij.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a06926e6cf---73263062300.pdfIn PDF document text
    • https://mayxaydungthienlong.com/uploads/files/files/28484571215.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/161346151176d5---pajujubezusimozesiramike.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=avengers+endgame+4k+stream+onlinePDF link annotation
    • 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_off0000ea7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7D 10808 bytes
SHA-256: 76d00d8e2e3e62af40637c843ba1ac997a5fd54d74d5254449efdc59e3f0ae2e
font_01_sfnt_off00010348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10348 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B5A 18680 bytes
SHA-256: 6ebbfb7297700e119b45244542ff76f36c0cc53644296f452c1e3a884d0df4a8