Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fc2190a7b7a85ff…

MALICIOUS

PDF

86.5 KB Created: 2021-09-20 21:13:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 03bfcfaf0be8f059666e2016b9a162f4 SHA-1: e349cd806b5b39b2c705c3978b53e52b5d9473e6 SHA-256: 7fc2190a7b7a85ffd38248aca800cd7840543806acad783ff8e27ec28a1d64fb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to external sites, suggesting a phishing or malware distribution scheme. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further suggests these URLs are part of a link farm designed to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://laborke.ru/uplcv?utm_term=stare+pc+hry+na+android PDF link annotation
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16132603d8eb53---soleminazimodosajiga.pdfIn PDF document text
    • http://residenzaeden-albisola.com/userfiles/files/26897972296.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/dirusokagujijekoribigap.pdfIn PDF document text
    • http://gazduire-domeniu.com/UserFiles/file/rifedaxiwafeguwoj.pdfIn PDF document text
    • http://bannhuaduong.net/upload/files/wufutidekemomo.pdfIn PDF document text
    • http://kaus21.com/userData/board/file/joromevifureziloz.pdfIn PDF document text
    • http://women-for-marriage.com/ckfinder/userfiles/files/63216288288.pdfIn PDF document text
    • https://buffinvestment.com/upload/ckfinder/files/99543625957.pdfIn PDF document text
    • http://sapientgenerator.ru/files/userfiles/files/54790866843.pdfIn PDF document text
    • http://highlevel.pl/userfiles/file/58621715933.pdfIn PDF document text
    • http://chuaphucluong.com/uploads/image/files/fasepukiz.pdfIn PDF document text
    • http://rund-sro.cz/UserFiles/File/33231536912.pdfIn PDF document text
    • http://captainkillmite.com/uploads/files/202109090025108129.pdfIn PDF document text
    • https://nirkongrp.com/ckfinder/userfiles/files/29020539105.pdfIn PDF document text
    • https://konchris.com/userfiles/file/1631821979.pdfIn PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/60829988998.pdfIn PDF document text
    • https://borgopitti.it/userfiles/file/91869079551.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/38b6470769f7f5efa9ae7166c7718f8b/nabojorirazabavomog.pdfIn PDF document text
    • https://baptistfriends.org/media/zimozobitefepejosusojo.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/29001596917.pdfIn PDF document text
    • http://caopump.com/admin/userfiles/file/fekidimidubolubo.pdfIn PDF document text
    • http://phoiinnhiet.com/images/uploads/files/basakamurotavumu.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://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_off0000e387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE387 21304 bytes
SHA-256: 894ca59002148ab45f9d4774798cf5f4d1237409d1fa390fae47e7dfd755a242
font_01_sfnt_off00011b3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3E 10584 bytes
SHA-256: 5aa3cd82a4be31d6998fe44447552dfd194a35a4f3229203e6bb58936306e0bc
font_02_sfnt_off00013358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13358 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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