Malicious PDF — malware analysis report

Static analysis result for SHA-256 61d265c7355d0dfe…

MALICIOUS

PDF

70.8 KB Created: 2020-12-26 11:22:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ceeea56cd35483db4d985895d26b53d0 SHA-1: 52b78ee6b6526d5b31c71c8ccac17ec73b4a5644 SHA-256: 61d265c7355d0dfec44030841e82464eba001705b9dde84f66d683e796948514
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains or link farms, designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to a 'Troy bilt horse riding mower drive belt diagram', suggesting a social engineering tactic to entice clicks on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/123?utm_term=troy+bilt+horse+riding+mower+drive+belt+diagram
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/figupetogo-salalosatavugi-nerodirabek-zulitelovesera.pdf
    • https://cdn-cms.f-static.net/uploads/4425504/normal_5fa7da7c59230.pdf
    • https://cdn.sqhk.co/bozadukopufu/VhjYOcD/liker_app_download_instagram.pdf
    • https://fukikabigo.weebly.com/uploads/1/3/4/4/134457586/rofudowebedif-liretixexo-fewozivi.pdf
    • https://purolejomi.weebly.com/uploads/1/3/0/7/130776639/dexogujomon.pdf
    • https://rexawalifutox.weebly.com/uploads/1/3/4/4/134458468/simezutugux.pdf
    • https://cdn.sqhk.co/vuzefegevo/ig5hfyy/donkey_kong_game_boy_advance_sp.pdf
    • https://pigamudabuv.weebly.com/uploads/1/3/4/2/134235231/8071573.pdf
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ratot_muweliwamopoj.pdf
    • https://cdn.sqhk.co/pavujakorige/jhCgez2/vinidutuluzapukep.pdf
    • https://fevuxutub.weebly.com/uploads/1/3/4/1/134131759/13a1a6692e.pdf
    • https://cdn.sqhk.co/nebuneduzib/UsjbhiV/rajinemawadibis.pdf
    • https://cdn.sqhk.co/xanodujijefu/ggee7ie/thermal_level_human_fall_flat_walkthrough.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4ca.bin
c7729af5923a1789d12132435020ca23b331a51cf7099bbf56f7444a4c421bad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CA 5584 bytes
font_01_sfnt_off0000e7af.bin
87c4786b581ddf6c79d5d51e2d87e0c4b0bcd285a9356663940171b1ca561e67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AF 11332 bytes

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