Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ec0d9417f7413db…

MALICIOUS

PDF

80.2 KB Created: 2021-01-15 15:01:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1303b7830586c3796dc9264ffbb73449 SHA-1: 7f09b77371a7b1ec8d19176f164f4e1f5726a974 SHA-256: 3ec0d9417f7413db8032ae8f558f3142049223a75345b8148731b354d8675782
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. It contains a large number of external links, many of which point to PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. The embedded URLs likely lead to malicious websites designed to phish credentials or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffnew.ru/123?utm_term=what+is+twic+card+for+truck+drivers PDF link annotation
    • https://cdn.sqhk.co/mugejufunij/hjFjbMq/mud_bogging_games_to_play.pdfIn PDF document text
    • https://cdn.sqhk.co/winelolibug/fRjijib/lyric_video_maker_download_free.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/bqhcih4/dark_heroes_battle_cats_review.pdfIn PDF document text
    • https://cdn.sqhk.co/dawajimet/jgP1tjf/nawewoxoligiven.pdfIn PDF document text
    • https://supavutoni.weebly.com/uploads/1/3/4/7/134713891/9798081.pdfIn PDF document text
    • https://cdn.sqhk.co/zowolanazew/7jcghOh/zombie_city_game_ios.pdfIn PDF document text
    • https://site-1168377.mozfiles.com/files/1168377/redline_racing_gts_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xakatikakizi/ihiiai2/82671246283.pdfIn PDF document text
    • https://xisofapetuv.weebly.com/uploads/1/3/4/7/134747578/5583502.pdfIn PDF document text
    • https://fuwefepitebu.weebly.com/uploads/1/3/4/7/134709748/zobuzafalewa_xofiginipopug_bagilaz_talupemozapomod.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/8jhdXgo/46573272992.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/la_cimbali_m27_re_manual.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_off0000fbee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEE 5308 bytes
SHA-256: 1539a4b3c753cb708a55f3437b0cec9ebfb8e72c55fb3191e9e0e7925422cd9a
font_01_sfnt_off00010e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E11 11060 bytes
SHA-256: 41729b6a8252cf326613a0ef2e5d06f47ba9a5d587c9954c0b363019ad0711c3

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