Malicious PDF — malware analysis report

Static analysis result for SHA-256 54dcecb5190a7a95…

MALICIOUS

PDF

85.7 KB Created: 2021-04-03 01:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2df7cd143430a6d0ad106919969424c8 SHA-1: 78dea833dd5b0d3d92aaff1f9ae2c31c32873b6d SHA-256: 54dcecb5190a7a95b1e195c352e193a418c5a7ce9ac20afb53e8f569715744f6
96 Risk Score

Malware Insights

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

The PDF contains embedded URLs that redirect to phishing sites, masquerading as a novel summary. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=the+maze+runner+novel+summary
    • http://fewutame.getenjoyment.net/simple_conical_projection_with_one_standard_parallel.pdf
    • https://cdn-cms.f-static.net/uploads/4481522/normal_60299ef86a215.pdf
    • https://static.s123-cdn-static.com/uploads/4480187/normal_5fff06e4e08ec.pdf
    • http://ganitigusawev.mygamesonline.org/galepured.pdf
    • http://banki-internetowe.com/39853024998zlabp.pdf
    • http://volosaty100.xyz/198108114858n3s6.pdf
    • http://jakiduve.scienceontheweb.net/teoria_normativista_del_delito.pdf
    • http://takaweri.mywebcommunity.org/pyramidal_tract.pdf
    • http://xofajenakimexo.iblogger.org/38882678242.pdf
    • http://doucheop.xyz/67350365010vi7ci.pdf
    • http://medebupima.sportsontheweb.net/chen_linear_system_theory_and_design_solution_manual.pdf
    • https://static.s123-cdn-static.com/uploads/4489422/normal_6007a144a43fb.pdf
    • http://zefefiwova.medianewsonline.com/affaire_cahuzac.pdf
    • http://forpost-electrica.ru/tensor_calculus_made_simple_sochiebz1w.pdf
    • http://bunnygummy.ru/milestone_project_management_templatedh7rr.pdf
    • https://cdn-cms.f-static.net/uploads/4402246/normal_604cbfb857d58.pdf
    • http://fajujefa.getenjoyment.net/modopiwitogikoziv.pdf
    • http://mebelrostov.ru/reactant_and_product_worksheetlov02.pdf
    • http://zukoretevir.medianewsonline.com/50009621130.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://pupudewasoxo.epizy.com/pusosaxowibadofu.pdf
    • http://tetiduba.rf.gd/fanexinigijibi.pdf
    • http://japamitafixe.myartsonline.com/muzigiwesisogadamusib.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010474.bin
8ce0496ef65e04703f4afac0de700b95a9e00bd0b4060aa98d09cbed21277188
pdf-font-stream PDF embedded font (sfnt) at offset 0x10474 4840 bytes
font_01_sfnt_off000114c5.bin
54d432a810c907f7db9d96891c6b0af5a663ec46c8f653394ca875f67a4c43e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x114C5 10788 bytes
font_02_sfnt_off000139cf.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x139CF 4324 bytes