Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aca211d84ccaf84…

MALICIOUS

PDF

80.5 KB Created: 2021-03-18 21:59:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac3353d5985599a041c93ad83335852c SHA-1: b7203faef6738e4951e64476ddac98929ea4665c SHA-256: 7aca211d84ccaf8450f2a67cd89908190327a922768556cf106b6541bb5b3603
96 Risk Score

Malware Insights

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

The file is a PDF document that contains embedded URLs, one of which is flagged as a potential phishing lure related to university question papers. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the nature of the PDF content suggest it is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://maypoin.ru/award?keyword=bangalore+university+question+papers+bcom+3rd+sem+pdf
    • http://xevusezes.medianewsonline.com/93348537809.pdf
    • https://cdn-cms.f-static.net/uploads/4406208/normal_60305a9e6672c.pdf
    • http://larokamexi.sportsontheweb.net/business_model_canvas_ca_netflix.pdf
    • http://ronojalad.22web.org/selenium_grid_interview_questions_and_answers.pdf
    • https://cdn-cms.f-static.net/uploads/4416923/normal_602d6f8e9a66a.pdf
    • http://powajaxib.medianewsonline.com/daxizediwedanozudaweluji.pdf
    • https://cdn-cms.f-static.net/uploads/4411493/normal_60224b92ed668.pdf
    • https://static.s123-cdn-static.com/uploads/4385631/normal_5fcb341197e9e.pdf
    • https://cdn-cms.f-static.net/uploads/4386834/normal_601c63c821199.pdf
    • https://cdn-cms.f-static.net/uploads/4478703/normal_603994daf30d5.pdf
    • http://vezujabajiwive.22web.org/47867169680.pdf
    • https://cdn-cms.f-static.net/uploads/4490274/normal_5fd1bc80bec4e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/voropa/2018_toyota_camry_le_android_auto.pdf
    • http://mebezoworo.rf.gd/17593542389.pdf
    • http://duxegejuw.atwebpages.com/how_to_calculate_f_statistic_from_anova_table.pdf
    • http://givonomiruf.rf.gd/medical_terminology_textbook.pdf
    • https://s3.amazonaws.com/fajeloninesitel/lagu_deen_assalam_adella_arlida_putri.pdf
    • http://wijotakobeje.epizy.com/how_to_install_nexus_mods_skyrim_special_edition_steam.pdf
    • https://s3.amazonaws.com/fidefofudi/difference_between_c_and_c.pdf
    • https://s3.amazonaws.com/wakuzidi/19918737656.pdf
    • http://tidomag.epizy.com/advanced_camarilla_trading_calculator_free.pdf
    • http://tasolemasolaka.epizy.com/basotect_g_datasheet.pdf
    • https://s3.amazonaws.com/vavale/46997954294.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_off0000f9fb.bin
5d1acf89e6ece7ee7e60e7a42e8d821f4c1ac1aa74e0dbdd03f47217abde94d0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FB 6116 bytes
font_01_sfnt_off00010ebc.bin
c47c834616f63b67bb922c72d1cee9c62f0b64a011dad607161ee1e2271abdcc
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBC 10852 bytes