Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cd255fdcce0bc79…

MALICIOUS

PDF

97.4 KB Created: 2021-01-11 12:17:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 751a852983228276fe9512ebc398469e SHA-1: 76d39b9c8580cc97ea7577affb161d2547a1c038 SHA-256: 2cd255fdcce0bc79586c75febe77cfcdbe182f3d1286537851587e0af5f5f05b
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded links, many of which are hosted on disposable domains and redirect to potentially malicious infrastructure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, possibly for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/aws?utm_term=bekhayali+song+kabir+singh+movie
    • https://rofunepez.weebly.com/uploads/1/3/2/7/132710772/zuxalivuvolole.pdf
    • https://nefakemibozike.weebly.com/uploads/1/3/5/3/135314079/7770086.pdf
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/valewipe.pdf
    • https://ponosozuvovisu.weebly.com/uploads/1/3/4/6/134668850/momelaladuwekowufene.pdf
    • https://site-1175739.mozfiles.com/files/1175739/faliwetikojofuguxetisok.pdf
    • https://xarirutufe.weebly.com/uploads/1/3/4/6/134659575/fibufaka.pdf
    • https://site-1178066.mozfiles.com/files/1178066/mabarolapijazibupij.pdf
    • https://rebazizezasij.weebly.com/uploads/1/3/4/5/134586802/dcaa70f9f00.pdf
    • https://pagafamowadaf.weebly.com/uploads/1/3/4/8/134878907/992646.pdf
    • https://mirinojasuri.weebly.com/uploads/1/3/4/5/134588432/doxuvojuxu_migibe.pdf
    • https://site-1180756.mozfiles.com/files/1180756/descargar_lokicraft_2_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL
    • 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_off000129c9.bin
955a6752d2a8491e557e3a0e9f162963041291c1b7240103d97982e4110ca83f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129C9 5512 bytes
font_01_sfnt_off00013c73.bin
7f32618446785ef7fdcedb04d4e42c06f614269629c59fb548b8487019160323		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C73 11408 bytes
font_02_sfnt_off000163af.bin
ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x163AF 16164 bytes

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