Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad081ed8c56d4f3e…

MALICIOUS

PDF

70.8 KB Created: 2021-02-20 22:41:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 07035123aba678cbacad9f8609f59d67 SHA-1: 2d85412be6b5f777a20a1c6afaebcb971bf9cc4a SHA-256: ad081ed8c56d4f3ec41ee05cb3866c7e21cd5274b4ae03b18e41785e24198cd2
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity, likely aiming to redirect the user to a compromised site.

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://baarspo.ru/strik?utm_term=voodoo+lab+pedal+power+2+plus+mounting+brackets PDF link annotation
    • https://cdn.sqhk.co/tulazofava/fX5Fzie/uefa_champions_league_teams_left_2020.pdfIn PDF document text
    • http://xitaboketeloba.iblogger.org/magirozofejokexagawa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413563/normal_600e97654a6f2.pdfIn PDF document text
    • http://maxawasoreveta.iblogger.org/restaurant_inventory_sheet_example.pdfIn PDF document text
    • https://cdn.sqhk.co/xafeperale/jiiSTii/79441605582.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482403/normal_5fe68b19d8c47.pdfIn PDF document text
    • http://lesedidunug.22web.org/42700559319.pdfIn PDF document text
    • https://widafesisitix.weebly.com/uploads/1/3/5/3/135321065/6814446.pdfIn PDF document text
    • https://cdn.sqhk.co/ginijetemepa/3EZibhg/design_wood_furniture_ltd.pdfIn PDF document text
    • https://cdn.sqhk.co/ferudati/vvlhgij/lerodenufosim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuwomuwudawim.epizy.com/lonosiperibiwun.pdfIn PDF document text
    • http://sopomamexuse.rf.gd/82334094571.pdfIn PDF document text
    • http://vonorubonazalok.epizy.com/george_foreman_indoor_outdoor_grill_recipes.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_off0000d366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD366 5784 bytes
SHA-256: dc28aea0fda3e90e997308c22e80741842042892a8539782b102d6c24fd54743
font_01_sfnt_off0000e71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71D 11436 bytes
SHA-256: a1806f53ef22228a196175db1c571f7952368150e222474b8a7c250ea7645644

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