Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d64a238782390dd…

MALICIOUS

PDF

79.5 KB Created: 2021-02-15 15:42:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7fc4a250846d536e04b725b849bc1949 SHA-1: 1c2639cafd3ecbc7205de062faa825736c00a928 SHA-256: 2d64a238782390dd9359e7dc6d3fddfabaf29197779a986b159215586e181092
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with a primary external URI pointing to 'https://seumenha.ru/wix?keyword=canon+t6i+user+manual', suggesting a lure to disguise malicious intent. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a date, but no direct instructions. The presence of multiple disposable hosting links further supports a malicious distribution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=canon+t6i+user+manual PDF link annotation
    • https://cdn.sqhk.co/zipuzedozame/fGhgprv/costume_jewelry_necklace_lot.pdfIn PDF document text
    • http://gigogon.22web.org/chakram_movie_video_song.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/iagdcgi/parif.pdfIn PDF document text
    • https://cdn.sqhk.co/zalopubid/dxgfAAp/8870760815.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/jdhcAjg/my_facebook_messenger_app_keeps_closing.pdfIn PDF document text
    • http://tadezutalowebe.22web.org/25911657949.pdfIn PDF document text
    • http://sirofopunisatus.iblogger.org/53968810804.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lodusebivepakef.epizy.com/1517735610.pdfIn PDF document text
    • http://zazuxidavo.rf.gd/34137132078.pdfIn PDF document text
    • http://fufezexu.epizy.com/agenda_docente_2019_gratis_chile.pdfIn PDF document text
    • http://xibaxet.rf.gd/leather_background_hd_wallpaper_free.pdfIn PDF document text
    • http://wekidezeze.epizy.com/sparkle_background_images_free.pdfIn PDF document text
    • http://taruxapajosavup.epizy.com/49157839388.pdfIn PDF document text
    • http://povagemu.rf.gd/67166313357.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC38 4888 bytes
SHA-256: 2e636c999191021fa81c298e3f5284429a0b476c4a6b09af417213d214d964e6
font_01_sfnt_off00010cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB5 10660 bytes
SHA-256: 0fc7022e7c49d9e4c5cd2c45ad4b995474f9a41372c8e776741d767a6a332bd4

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