Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c755b970bb8f72e…

MALICIOUS

PDF

69.7 KB Created: 2021-05-03 21:00:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa35926c74fe96b06bbd5dc49842e651 SHA-1: 2630351bb5da409359dd2572f8557c36770c8bf7 SHA-256: 3c755b970bb8f72e3d74fb1f7c04607464e7a1e13b0f7973230bc40aeed3a119
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a malicious domain, indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to deliver a secondary payload or redirect to a phishing site. No scripts were extracted, but the presence of an external URI and the overall detection profile point to a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/strik?utm_term=liebert+gxt3+3000va+battery
    • https://cdn-cms.f-static.net/uploads/4486037/normal_6068faa0eda1a.pdf
    • https://static.s123-cdn-static.com/uploads/4448121/normal_6006dc5f497ba.pdf
    • http://sosepojidoduxad.iblogger.org/b._sc_2nd_year_chemistry_book.pdf
    • http://fubikopelemom.mypressonline.com/bruner_discovery_learning.pdf
    • http://riragukigud.scienceontheweb.net/mckay_building_construction_volume_2_free_download.pdf
    • http://podcard2020.site/what_is_service_design_in_itilg12bu.pdf
    • http://fisujerekuvij.getenjoyment.net/algebraic_method_of_balancing_chemical_equations.pdf
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/alan_watts_become_what_you_are_summaryn1wvm.pdf
    • https://static.s123-cdn-static.com/uploads/4472488/normal_5fffcbced1365.pdf
    • http://lestyprin.online/38619854931nf1xi.pdf
    • http://gufutaca5.xyz/adi_handloaders_guidebiav1.pdf
    • http://rijupoxog.22web.org/5218846731.pdf
    • http://lorenbayi.com/vector_battery_charger_6-12_voltye6i7.pdf
    • http://gufutaca1.xyz/vsco_mod_apk_for_pcx53mr.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://788ae96d-7a4f-4726-91a9-07bb742fb3e7.filesusr.com/ugd/97aff7_977d52cf605e42cab1685c4ba8950637.pdf?index=true
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_f6a9d5639cc54becb6ed9d78a5ecb59a.pdf?index=true
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_12279f7717a947b6b4b8b30d5951d468.pdf?index=true
    • https://1527c8d3-3321-4e9f-872f-e2bebb57bac2.filesusr.com/ugd/bf2d42_7a63b742196f4ab0b942d63b55d6a814.pdf?index=true
    • http://pusovogubazix.epizy.com/ginup.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_off0000cf60.bin
57caeb02abb40e5832b25313c1d1e88221015b51f9f6466b7f85bc559391d6a2
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF60 5260 bytes
font_01_sfnt_off0000e16f.bin
23b8b160789bff4e1ebbbb4168bec7c01f1af5bc38251aaa307c0b85cf3d8d53
pdf-font-stream PDF embedded font (sfnt) at offset 0xE16F 11184 bytes