Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ebde89af32b195d…

MALICIOUS

PDF

73.1 KB Created: 2021-03-12 20:02:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd478fac2fef51c06adad4c13e422722 SHA-1: 1e79c6e755297b314800f9394e653e51f06d4c68 SHA-256: 3ebde89af32b195dad772129c025c978f86f3d756adb0fd4e34b041d9ed91418
96 Risk Score

Malware Insights

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

The file was flagged by a machine learning classifier and ClamAV as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The presence of an external URI pointing to 'jumiwimov.ru' suggests an attempt to redirect the user to a malicious site. Although no scripts were explicitly extracted, the PDF structure and the ML/ClamAV detections indicate a malicious intent, likely related to phishing or malware delivery.

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://jumiwimov.ru/123?utm_term=not+answer+tradu%25C3%25A7%25C3%25A3o
    • https://cdn.sqhk.co/virurewev/heththa/best_healthy_ninja_smoothies.pdf
    • https://cdn-cms.f-static.net/uploads/4380680/normal_601667fa8bff6.pdf
    • https://cdn-cms.f-static.net/uploads/4481400/normal_604aa3b018630.pdf
    • https://cdn-cms.f-static.net/uploads/4483851/normal_6026f1129892d.pdf
    • https://static.s123-cdn-static.com/uploads/4379231/normal_5fca3fc788348.pdf
    • https://cdn.sqhk.co/wolebiduju/QhefKgg/68920171386.pdf
    • https://static.s123-cdn-static.com/uploads/4464995/normal_5fecbdd095ed4.pdf
    • https://cdn.sqhk.co/bavomizobe/hhg4ogi/20562283289.pdf
    • https://cdn.sqhk.co/muxigatatini/hcz3iec/love_story_movie.pdf
    • https://cdn-cms.f-static.net/uploads/4500889/normal_602ba39861c1f.pdf
    • https://cdn-cms.f-static.net/uploads/4483864/normal_6046619bcd309.pdf
    • http://dojimifarekajiw.iblogger.org/encorafenib_prescribing_information.pdf
    • https://static.s123-cdn-static.com/uploads/4496815/normal_5fce8a180ea18.pdf
    • https://cdn-cms.f-static.net/uploads/4401989/normal_6045c841c5b27.pdf
    • https://cdn-cms.f-static.net/uploads/4461748/normal_601b19e43ad5d.pdf
    • https://static.s123-cdn-static.com/uploads/4455174/normal_5fe2c1bf43033.pdf
    • https://static.s123-cdn-static.com/uploads/4423137/normal_6002c32684da6.pdf
    • https://cdn.sqhk.co/japokaxe/aCxjiid/xipof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://birelasali.rf.gd/css3_selectors_cheat_sheet.pdf
    • http://lumawasisoxo.rf.gd/wofapamewuju.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_off0000df6f.bin
b9b01a7ae4e1f0deaf02aaa72ed6e142f8f44162cec30193ae84f3b720e27bec
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6F 5348 bytes
font_01_sfnt_off0000f12a.bin
5cb728967661b515dfa7d987eab0a8ce9ced0ff22c2c0aa06b9180a418484ffb
pdf-font-stream PDF embedded font (sfnt) at offset 0xF12A 11720 bytes