Malicious PDF — malware analysis report

Static analysis result for SHA-256 a09760d58545ba42…

MALICIOUS

PDF

71.3 KB Created: 2021-04-17 11:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 488b70f2c870ed3d7d8192d03fe9d777 SHA-1: 7662d4883d25acd856df554de53a007c85b6f1b4 SHA-256: a09760d58545ba42cb581c199fd84c1e3ecac1b4ed82586ad088451de2ad7c71
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI, pointing to a suspicious domain. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing trojan. The embedded URL is likely intended to redirect the user to a malicious site, possibly for credential harvesting or further malware 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://jumiwimov.ru/strik?utm_term=how+much+oil+does+a+2008+ford+escape+v6+take
    • https://cdn-cms.f-static.net/uploads/4403119/normal_6021924f855d3.pdf
    • https://xikunozazoteta.weebly.com/uploads/1/3/1/4/131453294/2429894.pdf
    • https://nifirasevaxo.weebly.com/uploads/1/3/4/7/134756957/misuxusijinife.pdf
    • https://cdn.sqhk.co/dukapudubi/ChfgiEW/sani_cloth_af3_coronavirus.pdf
    • https://cdn.sqhk.co/javeduner/hd8ijhi/warhammer_fantasy_roleplay_adventures.pdf
    • https://cdn.sqhk.co/xoradofexul/chjDHXx/drunkn_bar_fight_psvr_alley.pdf
    • http://dizigazux.22web.org/polinesim.pdf
    • https://lemorixumo.weebly.com/uploads/1/3/4/7/134748879/bufekar.pdf
    • https://static.s123-cdn-static.com/uploads/4486368/normal_5fca891c8d5f6.pdf
    • https://toxutumopomepe.weebly.com/uploads/1/3/5/3/135327812/b1d8f97.pdf
    • https://folejate.weebly.com/uploads/1/3/4/9/134902611/xitume-dugofu-jaxapivod-wonewatonavivid.pdf
    • https://cdn-cms.f-static.net/uploads/4404745/normal_604a9a9790041.pdf
    • https://kofulunaj.weebly.com/uploads/1/3/5/3/135320514/ed4e35775e12ed.pdf
    • https://nokafixawawi.weebly.com/uploads/1/3/1/6/131606940/03f7719dca.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d21e179c-95d3-4a07-8104-4f4ed5d8b08f/jt_alert_x_v2.6.1.pdf
    • https://uploads.strikinglycdn.com/files/560bb095-cd77-44b6-9d3f-777807b028e0/44573413331.pdf
    • https://uploads.strikinglycdn.com/files/a875dbdc-0ee6-4150-9d70-326c9fafe61a/the_investment_answer_review.pdf
    • http://famirafopuremu.rf.gd/advertising_agency_structure.pdf
    • http://pilunoteven.rf.gd/fifty_shades_of_grey_watch_online_full_movie_dailymotion.pdf
    • https://uploads.strikinglycdn.com/files/4566695d-9001-40f9-bbd7-32fc02215d7a/what_does_not_in_service_mean.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_off0000d5f7.bin
a0e1820c03b5fb3a406667c2e9fdbf932aee84335402c367e1e69fd048139c77
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F7 6192 bytes
font_01_sfnt_off0000eaf8.bin
8f6aa586b9134614a760c8fd11db6342178ed0721e67158bcb10d06e17a26310
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF8 10940 bytes