Malicious PDF — malware analysis report

Static analysis result for SHA-256 be4b0c451dc79dd3…

MALICIOUS

PDF

75.6 KB Created: 2021-03-30 15:37:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c62302891912708ea9557153b0b7d353 SHA-1: a8fa5c3ebeca94c45d613e4dcd54252a5cc02303 SHA-256: be4b0c451dc79dd3728ce2d07fc3ffe54587c2aadf09da7e6c0cc8756b1fc920
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 malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or delivering a secondary payload. The document body, though heavily obfuscated, appears to be a lure related to management control systems, aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/award?keyword=characteristics+of+management+control+system+pdf
    • http://bawikivogo.22web.org/10757318359.pdf
    • http://sebekeruxa.iblogger.org/play_chess_online_with_friends_android.pdf
    • http://usesalon.xyz/aeron_chair_headrest_atlasi29ph.pdf
    • http://spoonnumberone.xyz/kalakekanolagabivudjr2b5.pdf
    • http://erogan-columbia.site/salary_for_entry_level_information_technologyzkaci.pdf
    • http://memokepudag.iblogger.org/blank_australia_map.pdf
    • http://newsportstechnology.ru/60987501925olm10.pdf
    • http://zemimumaloger.iblogger.org/fizemawakudajub.pdf
    • http://koteyarn.moscow/novinipakezibuk1ed7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lepefi/besimitije.pdf
    • http://rukateridexak.rf.gd/fishing_report_cape_cod_times.pdf
    • http://tobekiginekafo.epizy.com/99367629764.pdf
    • https://cc652f91-b1ab-470c-b36f-46d838ef85b2.filesusr.com/ugd/fbccce_b7a337a194e04116b60ec66c39332869.pdf?index=true
    • http://bumusilofinufaf.rf.gd/32297413569.pdf
    • https://eadb47d6-6712-4ecd-aa5a-2cdcf2d90b86.filesusr.com/ugd/c844bf_f407effaa532441cb627310403f42a42.pdf?index=true
    • http://febarufowit.epizy.com/ripum.pdf
    • https://s3.amazonaws.com/mikibetiv/vomakabawadefa.pdf
    • https://0c3b2bb2-3ac9-4e0e-a0b2-530a831cdf0d.filesusr.com/ugd/23193f_85e4a364ee6e4ce496081067502d7cb4.pdf?index=true
    • http://zowiseli.epizy.com/blackberry_z3_software_update.pdf
    • https://s3.amazonaws.com/paxuvagal/internetworking_with_tcp_ip_principles_protocols_and_architecture_6th_edition.pdf
    • https://s3.amazonaws.com/palikuvexake/oster_convection_countertop_oven_parts.pdf
    • http://koziviwuvep.epizy.com/77248882214.pdf
    • https://1a441fb4-51dd-4528-a053-eb59ff664e18.filesusr.com/ugd/43d9d5_2fde436b4f60421caadfc5a4a729289a.pdf?index=true
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_f11e4ada2da9414ca330b224bdaa845b.pdf?index=true
    • 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_off0000eba9.bin
a04361d8ff8da6fb649a02287b3ad0b40c7c30d447fad4737d730e536a45a983		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA9 5576 bytes
font_01_sfnt_off0000fe79.bin
8eef06bf0d0ceb6eb4ede09487267eaf89d6cde9d3b41b20273c9c280103c84d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE79 10088 bytes

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