Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdbb6011c19b5cc4…

MALICIOUS

PDF

79.7 KB Created: 2021-09-24 06:08:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2125e0607219625574f10a1fcea8e6f0 SHA-1: 6a6ed32baa4214259394b979ac2df9fb87a319f1 SHA-256: bdbb6011c19b5cc4f384384a8c4c2e14aff64c6bfadbf1e4a177fc36b8126bd5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains, indicating a link farm designed to obscure the final destination. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution through the linked content. The presence of embedded JavaScript (T1059.007) suggests an attempt to exploit PDF vulnerabilities or redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9899

Heuristics 6

  • 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.
  • 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://musicincw.com/fckeditor/userfiles/image/timufabuji.pdf
    • http://jonme.net/ckupload/files/bafivedipogunozuw.pdf
    • http://woodlandhills.ilovepokebar.com/uploads/files/22079134635.pdf
    • https://nutrishop.in/ci/userfiles/files/57487185528.pdf
    • https://www.alitec.es/js/ckfinder/userfiles/files/68357582695.pdf
    • https://srccaa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/83700251720.pdf
    • http://rosg.net/sa_upload/userfiles/file/20210905125639.pdf
    • http://jpsacademy.com/slbdavbatala/userfiles/file/41810708621.pdf
    • https://acconpriti.com/ckfinder/userfiles/files/rifonugavejap.pdf
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/47657900499.pdf
    • http://chukguwang.com/files/fckeditor/file/60902977709.pdf
    • https://synersys.fr/contenu/file/kisitafunis.pdf
    • http://infoguard.ru/content/file/pusuxirososim.pdf
    • https://bisleriwheel.genefied.co/ckfinder/userfiles/files/vikodiwegonusitimuxomaxo.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/bb33a4f4ca2d156af125ed9e4b7fa3d7/gakuxebodone.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/161306cbc46810---lumowete.pdf
    • https://ecpa.fr/uploaded/file/wotopudewixajejupononik.pdf
    • http://police8coop.com/UserFiles/file/sopeze.pdf
    • http://www.blueoak.fr/image/file/10848327465.pdf
    • http://52fotki.ru/ckfinder/userfiles/files/dixajukudolup.pdf
    • http://hitmet.slektenkaas.com/bilder/file/liwisuvekinunudider.pdf
    • http://aquamedia.cn/ckfinder/userfiles/files/zusanarirebolirapaxo.pdf
    • http://sensi-leszno.pl/userfiles/file/31297308098.pdf
    • https://aspirecambodia-edu.org/userfiles/file/45348186520.pdf
    • https://atkarisuli.hu/userfiles/file/58875914609.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=la+sociedad+de+la+nieve+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_off0000d25a.bin
b119b3919c1ac15c0dc09e5b738d475ed3c5881243a9231b9342c6dd3cfdf069		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD25A 18588 bytes
font_01_sfnt_off000101a3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101A3 16792 bytes
font_02_sfnt_off000119ba.bin
f789f8775b14602856b001376d97696394f77818c7d1a5869b94fbba011b837b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119BA 10436 bytes

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