Malicious PDF — malware analysis report

Static analysis result for SHA-256 109e52dea26751b6…

MALICIOUS

PDF

75.3 KB Created: 2021-03-14 06:14:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 958e5fbb956c1108d89774ff4cc2f5ab SHA-1: 1622eeae67b6c124652edfc64951cad2a5b8b958 SHA-256: 109e52dea26751b67b2eabc9a65c5d4ee43dae9a37aecbd04d61f0dad7375c12
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to facilitate initial access via spearphishing.

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://zajinet.ru/strik?utm_term=abraham+lincoln+biography
    • http://13millions.store/xurefexofegeba6anjc.pdf
    • https://lapamijivosesez.weebly.com/uploads/1/3/4/5/134507295/04f0010.pdf
    • https://cdn.sqhk.co/bimolixumotu/ehmia1c/99399007796.pdf
    • http://prodit.space/firex_120-890b_manualur9px.pdf
    • https://cdn.sqhk.co/wogokodu/ieidvAA/60359704114.pdf
    • http://gudazugaxogipo.22web.org/beginner_bohemian_rhapsody_piano_sheet_music.pdf
    • http://robinmani.site/hrbp_interview_questions_and_answers3ci09.pdf
    • https://serewutedirafam.weebly.com/uploads/1/3/5/3/135339767/44931.pdf
    • http://gofidiva.iblogger.org/70733983983.pdf
    • https://static.s123-cdn-static.com/uploads/4392210/normal_5fe58d4a64ebf.pdf
    • http://affilateapp.online/326389445725k5jr.pdf
    • http://meetsol.xyz/past_tense_verb_list_regularfrjy8.pdf
    • http://tirevuvezig.22web.org/bigojovozidirawopevuz.pdf
    • https://vuverararusug.weebly.com/uploads/1/3/4/8/134883490/538499.pdf
    • https://cdn-cms.f-static.net/uploads/4478703/normal_6041c1d12aa62.pdf
    • https://tibagikusutugox.weebly.com/uploads/1/3/0/7/130775046/pexazametutowakaka.pdf
    • https://cdn-cms.f-static.net/uploads/4444623/normal_602758ee1e5bb.pdf
    • https://static.s123-cdn-static.com/uploads/4388405/normal_5ff452c2e2f3a.pdf
    • https://static.s123-cdn-static.com/uploads/4402956/normal_5fca62ff69a77.pdf
    • http://lavka-karamel.ru/pdp_xbox_one_controller_not_working923x7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tufubumokagefe.rf.gd/270435327.pdf
    • 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_off0000e942.bin
8d470359803d9a3dc65cb8fee5aebaa7008c3a788566fe8f012e9c73b6d1b7c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE942 5400 bytes
font_01_sfnt_off0000fb7c.bin
2e0c112fd67c17014d45f13f13460d64a2f8acba6ebb491fa0eff5c262c43e56		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7C 10608 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.