Malicious PDF — malware analysis report

Static analysis result for SHA-256 892c13a3c7efcdf4…

MALICIOUS

PDF

76.7 KB Created: 2021-02-19 01:48:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6d7968919083d9970180d43186f46d2 SHA-1: 155d919ec3dee9e038867a9ef64be968165deb80 SHA-256: 892c13a3c7efcdf4a40ddffe6d2bccbceeae35387fabbda8d9be17c47cfbab69
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, 'bologen.ru', which is likely used to host a phishing page or download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to '1st law of thermodynamics worksheet pdf', indicating a social engineering attempt to trick the user into visiting the malicious URL.

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://bologen.ru/wix?keyword=1st+law+of+thermodynamics+worksheet+pdf
    • http://nimiridisavir.22web.org/website_header_design_templates_code.pdf
    • https://cdn.sqhk.co/xiwapusumoge/eUihC1x/5909427411.pdf
    • http://xemopubuga.iblogger.org/mendelian_genetics_worksheet_1_answers.pdf
    • https://cdn.sqhk.co/tifobebe/gyjfRic/vosusugimijod.pdf
    • https://cdn.sqhk.co/jorisuzil/hgT3boR/starfish_manor_hotel_nautica_suite.pdf
    • https://cdn.sqhk.co/gilevetu/iab2xj7/core_x_system_canada.pdf
    • https://cdn.sqhk.co/zonakagud/bjet0ln/best_of_the_eagles_album_cover_location.pdf
    • https://cdn.sqhk.co/puxedimuwo/hcjdqid/jasper_report_tooltip_expression.pdf
    • https://cdn.sqhk.co/pafevola/jejf6AW/mavuvevanizizukesoxorufa.pdf
    • https://cdn.sqhk.co/fusevesapime/hfLddhe/53315854312.pdf
    • https://cdn.sqhk.co/mikedeto/fjeYNjh/tozijifulugaxudigevanapi.pdf
    • https://cdn.sqhk.co/mofosalamo/VexuB4N/nikeboziloxorejipiromoj.pdf
    • https://cdn.sqhk.co/raxuzuvuluf/Pgd4Rhb/carnivores_ice_age_mod_download.pdf
    • https://cdn.sqhk.co/fabavukunatu/iOhhjbp/tipodeporakojinaw.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://solatilexi.epizy.com/odia_bhajan_nonstop_dj_song.pdf
    • http://robogotut.epizy.com/7071808646.pdf
    • http://nozovov.rf.gd/85417565161.pdf
    • http://lokuvutifinulef.rf.gd/how_to_install_a_ceiling_fan_without_the_downrod.pdf
    • http://wipidomi.rf.gd/net_framework_3._5_full_offline_installer.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfc8.bin
fef988247b811a372aaf92dc1bfc3df48cafb0d12c6719b307c9653082a60128		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC8 2460 bytes
font_01_sfnt_off0000dad2.bin
8ed282ffd652fd3893132472d166debaa2782ab6aba4abb52412e1167118d9a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD2 5608 bytes
font_02_sfnt_off0000eddb.bin
693a985b6b1a5e81831a6a8e3518a2dcb637dde6d22129b2ee3975c51ec67f53		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDB 9700 bytes
font_03_sfnt_off00010f56.bin
c71b0f50d8c3dc6979512fe6e5575c7df5d4a9c99d8808cd2be629ca5f20be94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F56 16180 bytes

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