Malicious PDF — malware analysis report

Static analysis result for SHA-256 92a4fb013ca0dfe0…

MALICIOUS

PDF

82.0 KB Created: 2021-03-23 21:41:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9bb051f06856da7902967d835f88723 SHA-1: e3154cf0ca9b1c1b633cedf5600911fdfcc6f720 SHA-256: 92a4fb013ca0dfe03aa5f8344484a01e0fb0a1987c4575c8add419299805b5f7
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a malicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of external URIs suggests an attempt to redirect the user to a compromised or malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=nh+february+school+vacation+2020+activities
    • http://nugowimabu.mywebcommunity.org/manumematovumivagajupumeb.pdf
    • https://cdn-cms.f-static.net/uploads/4383322/normal_6013c5e9ed585.pdf
    • http://giwapozolaleg.mypressonline.com/tuzanesisogifufijewajegej.pdf
    • http://suzamakulamuj.mypressonline.com/87348079236.pdf
    • https://cdn-cms.f-static.net/uploads/4386839/normal_5fd5f04dacb6a.pdf
    • https://cdn-cms.f-static.net/uploads/4386081/normal_60368621c0931.pdf
    • https://static.s123-cdn-static.com/uploads/4406806/normal_60082351c31b1.pdf
    • https://cdn-cms.f-static.net/uploads/4389606/normal_6035cda1bcb5a.pdf
    • http://sutarakikim.scienceontheweb.net/the_exorcist_tv_series_season_2_watch_online.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fijijap.rf.gd/comparing_communism_and_socialism_worksheet_answers.pdf
    • https://uploads.strikinglycdn.com/files/1f67a9b6-fea9-4c32-b4fc-3221adc565f5/zonurasef.pdf
    • https://uploads.strikinglycdn.com/files/7bad4d7b-388e-4035-b85d-2be170d4aea6/manufacturing_operations_manager_jobs_near_me.pdf
    • http://lalasajunes.rf.gd/one_way_anova_example_problems_with_solutions.pdf
    • https://uploads.strikinglycdn.com/files/26b55708-fb5b-4711-af07-6875510abf04/dijabelejidu.pdf
    • https://uploads.strikinglycdn.com/files/73c7a7dd-1e13-44a6-ac43-73d6b390e06f/vipofosogosinikopoz.pdf
    • https://uploads.strikinglycdn.com/files/46b8da3b-cfb4-4c99-abbe-81f6ddf9d508/conair_steamer_handheld_review.pdf
    • http://lumigetutiburu.epizy.com/error_cannot_find_module_webpack_lib_template.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_off00010522.bin
8b72d720a25912f13bf8e47fa2f2a7c7a0416585b282be5072144724f07cd424
pdf-font-stream PDF embedded font (sfnt) at offset 0x10522 5516 bytes
font_01_sfnt_off000117f2.bin
3877ac4758fb0dfc75adfa96eae6b99cde9e95b3d9ca3d022b2cb27dddfbad0c
pdf-font-stream PDF embedded font (sfnt) at offset 0x117F2 10228 bytes