Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fd6a8518b27fc0e…

MALICIOUS

PDF

77.6 KB Created: 2021-09-13 06:33:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 59cef0de19097eb25e4287865a5de72d SHA-1: 96d23208459b94c0c75e750452f90ba96a173e32 SHA-256: 7fd6a8518b27fc0ef4be32d643f89963faefa0bd5150e5e98de9293cc0569a54
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. Heuristics indicate it functions as a link farm, directing users to numerous external URLs, many of which are hosted on disposable domains. While no scripts were explicitly extracted, the PDF structure and its nature as a link farm suggest it's designed to redirect users to potentially malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://bruceleevideos.org/images/file/5783133013.pdf In PDF document text
    • http://ellenia3.eu/userfiles/files/26457945520.pdfIn PDF document text
    • http://ap116.ru/userfiles/file/89397719306.pdfIn PDF document text
    • https://eliteplacementagency.com/uploads/files/73625392712.pdfIn PDF document text
    • https://brs.jo/userfiles/files/rokikewoxajijowusiwi.pdfIn PDF document text
    • http://bayanairag.com/uploads/userfiles/files/67633756853.pdfIn PDF document text
    • http://nickelsgrafikdesign.de/ckfinder/userfiles/files/kenuk.pdfIn PDF document text
    • http://tpfish.com.taipei/archive/upload/files/tatevasonapisodewi.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/82295214050.pdfIn PDF document text
    • http://goang-hann.com/uploads/files/202109071627598024.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/sapifilenixuteveverevumo.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/35058382575.pdfIn PDF document text
    • http://grubstreet.ca/ckfinder/userfiles/files/muxevugazisofo.pdfIn PDF document text
    • https://ssmavidiyar.com/public/content-images/files/madulixat.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/mlbc1ma060dspm74kpcdk7ji71/35613136197.pdfIn PDF document text
    • https://408of53crownstreet.com/assets/media/files/39473124375.pdfIn PDF document text
    • http://about-dogs.ru/upload/file/55327005554.pdfIn PDF document text
    • http://automyjka.pl/automyjka.pl/userfiles/file/8914916642.pdfIn PDF document text
    • http://www.pantonerestauri.com/ckfinder/userfiles/files/vumujatowafoluwaxadomatej.pdfIn PDF document text
    • http://vivo-mebel.ru/upload/file/fumefumeki.pdfIn PDF document text
    • https://mingyi-lock.com/data/file/userfiles/files/vagegewije.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=rupaul+untucked+season+13+watch+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_off0000cba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA2 11060 bytes
SHA-256: 9942f06e64c010e6947417985f5756f6c62cd460419f7fb5e0c8fc0ae9277d23
font_01_sfnt_off0000e57c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8E 16780 bytes
SHA-256: 356d7a8c6e2336a4339019c037c8201d2756c73da9d17587116cf7dc67ac76b2

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