Malicious PDF — malware analysis report

Static analysis result for SHA-256 b52e07f073c5935b…

MALICIOUS

PDF

82.5 KB Created: 2021-03-17 18:37:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99949123352b295b0ee32f4c55c8e530 SHA-1: 9a268f2affeea378adaa3edd3c0a4121a41d9355 SHA-256: b52e07f073c5935bb2db9c001708ba1a898833c78f699cf12953a0923210452b
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs pointing to potentially malicious domains, suggesting it's designed to redirect users to phishing or malware hosting sites. The document body, though heavily obfuscated, contains keywords related to the embedded URIs, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/award?keyword=alternative+fuels+for+transportation+pdf
    • http://kovafuwir.getenjoyment.net/tipos_de_fistulas_perianales.pdf
    • http://zegigujeluk.iblogger.org/why_is_python_the_best_language_to_learn.pdf
    • http://kojenobowi.iblogger.org/daxafinoxi.pdf
    • http://fiwovoxas.22web.org/15359614756.pdf
    • https://cdn.sqhk.co/resasenubori/Ki3EggR/tamil_christian_songs_music_only.pdf
    • https://static.s123-cdn-static.com/uploads/4405642/normal_5fe1b58760ccd.pdf
    • https://cdn.sqhk.co/zixagiko/iettPT3/24113545062.pdf
    • http://wixujikubipom.mygamesonline.org/frame_relay_packet_tracer.pdf
    • https://cdn.sqhk.co/gabironero/YijuDKW/33435308027.pdf
    • http://suxoxaxowigab.scienceontheweb.net/31154491617.pdf
    • http://safijejog.mygamesonline.org/31692475302.pdf
    • https://cdn.sqhk.co/zisujidixa/hbij5ig/kegasunapotajuzasi.pdf
    • http://wodedutipif.medianewsonline.com/59370597206.pdf
    • https://cdn.sqhk.co/kojivitew/UifJPZY/street_fighter_3_apk_android.pdf
    • https://cdn-cms.f-static.net/uploads/4467277/normal_6011eff1b5070.pdf
    • https://static.s123-cdn-static.com/uploads/4365540/normal_5fccb05b08220.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gapivegek/41393652855.pdf
    • http://wepogevadapafa.atwebpages.com/fagimagufupesipor.pdf
    • https://s3.amazonaws.com/zoromexemuzid/59569028060.pdf
    • http://kagijido.myartsonline.com/english_grammar_book_download_for_ssc.pdf
    • https://s3.amazonaws.com/poresi/anti_money_laundering_reporting_uk.pdf
    • https://s3.amazonaws.com/jofunozuzof/home_inspection_report_negotiation.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_off0001079c.bin
5eb389e11456f98151eec18108b31b7006191beee925e47dd4f7fe43f1df86e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1079C 5084 bytes
font_01_sfnt_off00011900.bin
885ff52eac7ab4929c76029f253465da87c23008ac34122cb8f2019271635fee
pdf-font-stream PDF embedded font (sfnt) at offset 0x11900 10460 bytes