Malicious PDF — malware analysis report

Static analysis result for SHA-256 83d2381e5865a488…

MALICIOUS

PDF

67.4 KB Created: 2021-03-16 01:26:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5baeaccb32694c9ec2b7e24f6a3a289 SHA-1: 36a7dce8f73bb555e7659dd90f8365ebc0997f38 SHA-256: 83d2381e5865a488490a7f13704d5748e607f72d5a0417fc2a62e86e50bd0aea
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that directs the user to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit user interaction for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/strik?utm_term=how+to+change+picture+background+color+in+paint+3d
    • https://cdn-cms.f-static.net/uploads/4368228/normal_6040fd85e14a4.pdf
    • https://cdn.sqhk.co/nawakema/njflaKr/bitigafoj.pdf
    • https://cdn.sqhk.co/pasojixaju/iaCWEqe/advance_auto_parts_jobs_ocala_fl.pdf
    • https://cdn.sqhk.co/figegixo/fcMih02/magazine_bibliography_apa_format.pdf
    • https://cdn.sqhk.co/felibepudu/UZhcgjb/grandfather_clock_flute_sheet_music.pdf
    • https://static.s123-cdn-static.com/uploads/4473903/normal_5fe257df9350a.pdf
    • http://goxivomibivufuv.mywebcommunity.org/4d_printing_technology.pdf
    • https://cdn.sqhk.co/gabadifofibo/MphdjBS/dedor.pdf
    • https://cdn.sqhk.co/savaketiju/ihiggjg/30541445512.pdf
    • https://cdn-cms.f-static.net/uploads/4481852/normal_5fd1288844d7e.pdf
    • https://cdn.sqhk.co/muzorefu/xyjfknY/80897035817.pdf
    • https://cdn.sqhk.co/dajebala/jiEpbjf/funny_videos_of_cats_and_dogs_dancing.pdf
    • https://cdn.sqhk.co/wifinalimow/icjjhiE/82258503572.pdf
    • https://cdn.sqhk.co/vefusujix/ijgejd1/97848314881.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/62e85f27-34d5-4e98-9b17-25d75256bbc9/how_to_add_works_cited_in_google_docs.pdf
    • https://uploads.strikinglycdn.com/files/e43b10ac-c9ff-4763-9c37-dc5361d3843c/42732320583.pdf
    • https://uploads.strikinglycdn.com/files/86d11121-dc4a-4487-961d-9c5161f1ccf2/75919447586.pdf
    • https://uploads.strikinglycdn.com/files/6a51385e-bfa8-40dd-8f89-ea8d9834f4cd/magikiwijuximajinir.pdf
    • https://uploads.strikinglycdn.com/files/b27b83a1-dafa-40d7-9ee9-6cee5f1a69a1/what_is_the_best_free_dwg_viewer.pdf
    • https://uploads.strikinglycdn.com/files/78aee0a2-e286-41fb-831b-b6dbb31eccd1/what_is_ethics_in_sport_management_research.pdf
    • http://vibirokudod.myartsonline.com/wonumek.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_off0000ccdc.bin
3cbd613c017a663e57c656c544e999498d4dc7d6a79773ccfd1cc4d35e013aaa
pdf-font-stream PDF embedded font (sfnt) at offset 0xCCDC 5580 bytes
font_01_sfnt_off0000dfdd.bin
a7da7dbe6b2391662e1778c2116c56336dffd5ac0ee04075be725411a8c7aabb
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDD 9408 bytes