Malicious PDF — malware analysis report

Static analysis result for SHA-256 34d96026a7f1d941…

MALICIOUS

PDF

217.5 KB Created: 2021-03-16 21:56:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2dbab3ed56580cd6287307dbb69a5ce2 SHA-1: c831456848051adce8f7f9c78f7acd2f2852e34f SHA-256: 34d96026a7f1d94159ee5c0e5f1dbaa8c5d265d564d61d4fc96ef34fb64ce06f
136 Risk Score

Malware Insights

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

The file is a PDF that contains embedded URLs, one of which is used as a lure for a user guide. The ML classifier and ClamAV detection strongly indicate maliciousness. The presence of external URIs and the 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggest the document is designed to trick the user into downloading a password-protected archive, likely containing a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://dugedepap.ru/123?utm_term=bizhub+c250+user+guide
    • http://koreanluxe.com/kuretetetebovuzilemere4j1x2.pdf
    • https://kozenuxifojani.weebly.com/uploads/1/3/4/6/134665776/467660.pdf
    • https://lelopotive.weebly.com/uploads/1/3/0/7/130738546/runajanube_vipukopukoruw.pdf
    • https://betubuko.weebly.com/uploads/1/3/1/3/131379781/dikijonuzife-gipagezom-xixaxugi-bogirerit.pdf
    • http://presalon.xyz/audio_beats_pro_2._8_apkntsy0.pdf
    • https://cdn.sqhk.co/kefiruge/KljdggT/64741629020.pdf
    • https://wezefumuge.weebly.com/uploads/1/3/4/6/134614004/rujafopinimidivur.pdf
    • http://dalnoboyi.xyz/82129269648ki6il.pdf
    • https://fenatafu.weebly.com/uploads/1/3/1/6/131637570/lotovozumajebefupe.pdf
    • https://xigepeseforala.weebly.com/uploads/1/3/4/5/134508125/212700f0a6c7cfe.pdf
    • http://mebelintera.ru/odisha_map_download_in_englishzv644.pdf
    • http://repaircreditscore.info/6890722293ajm6.pdf
    • http://kkkirrreeee.space/vacation_itinerary_samplec4i1c.pdf
    • http://help-verifiedbadgecenter.com/64477199259pvrrg.pdf
    • http://jujiwaneko.iblogger.org/xebutovigemomogatuv.pdf
    • https://cdn.sqhk.co/tibatojo/cigJDr7/7122817391.pdf
    • https://leviwajij.weebly.com/uploads/1/3/1/6/131637177/dezonidujiwigubevu.pdf
    • https://dafebifu.weebly.com/uploads/1/3/4/3/134399244/tojipolusu_dokiwafapusupe_bajoroxi_lujokota.pdf
    • https://lujiwosibe.weebly.com/uploads/1/3/4/0/134040634/84ab21c91a1e4ab.pdf
    • https://cdn.sqhk.co/tulotunofuz/bhiidgf/girl_s_war_z.pdf
    • http://ighelperscenter.com/how_to_activate_nordictrack_elliptical_without_ifitrr0ja.pdf
    • http://sluzhba1.net/un_grito_desesperado_resumen_por_capitulosw6xdt.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fojofediwesifog.rf.gd/28697330715.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_off0003167a.bin
2378194ba8057e8cdc06a0b05b9cb317b2e9dc7a1730d507cd7e66b1ffb46ab0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3167A 5596 bytes
font_01_sfnt_off00032993.bin
42d62b98f41a06d9a3fc3122b3b235fc5155f42b975681dd2d76511961cffeca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32993 13900 bytes

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