Malicious PDF — malware analysis report

Static analysis result for SHA-256 794b9767badd31c5…

MALICIOUS

PDF

88.8 KB Created: 2021-03-09 21:19:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6144853998604da9668b54227185d3da SHA-1: ea57aa58b9bf44ab0ed3a0c21011390fd6c475af SHA-256: 794b9767badd31c5ef2c861813ddc19aaf3655f544dfd584476bacfbb6ece635
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely used to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains references to 'Symantec bluecoat proxysg' and 'wkhtmltopdf', suggesting a potential lure related to network security or document generation tools.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/123?utm_term=symantec+bluecoat+proxysg
    • http://ligumiju.iblogger.org/entwine_crossword_answer.pdf
    • https://static.s123-cdn-static.com/uploads/4484399/normal_5ffb9a7d1bf49.pdf
    • https://cdn-cms.f-static.net/uploads/4452157/normal_603bbc841637b.pdf
    • https://static.s123-cdn-static.com/uploads/4446789/normal_600220791a2e4.pdf
    • https://static.s123-cdn-static.com/uploads/4472495/normal_600140f34154c.pdf
    • https://cdn.sqhk.co/gimovitax/gFjaoJ2/t800_cyborg_vision_arlington_va_22201.pdf
    • https://cdn-cms.f-static.net/uploads/4393644/normal_60129548e3e12.pdf
    • https://cdn-cms.f-static.net/uploads/4449965/normal_60236f25dfb6b.pdf
    • https://static.s123-cdn-static.com/uploads/4420748/normal_5feb6be45be1d.pdf
    • https://static.s123-cdn-static.com/uploads/4372985/normal_6006d018a1318.pdf
    • http://xupenirulavep.iblogger.org/smart_watch_sim_card_android.pdf
    • https://cdn-cms.f-static.net/uploads/4500450/normal_603594ee7e395.pdf
    • https://cdn.sqhk.co/tuwetebep/bhj5hfd/basketball_battle_mod_apk_free_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xupimaral/zidumed.pdf
    • https://uploads.strikinglycdn.com/files/40266572-d55d-4f3b-a8ac-25bfd97e77ac/texas_instruments_ti-30xs_multiview_scientific_calculator_near_me.pdf
    • https://uploads.strikinglycdn.com/files/0c37d514-ee18-40e5-9e22-5f5aefdedbcd/goresifijesus.pdf
    • https://uploads.strikinglycdn.com/files/50015f75-28a0-4dd2-8e37-928c895d9cc0/totudo.pdf
    • https://s3.amazonaws.com/lupebesu/silazowonarokaxenusaxuboj.pdf
    • http://tesusaruva.epizy.com/metformin_causes_bubbles_in_urine.pdf
    • https://uploads.strikinglycdn.com/files/52dfc138-81a8-4a3c-ab4b-98e78301d449/windows_10_keyboard_shortcuts_change_language.pdf
    • https://uploads.strikinglycdn.com/files/3027b1e9-61c2-40e4-8e89-0fd9979cafbf/how_to_use_zone_of_proximal_development_in_the_classroom.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_off00011c8d.bin
4cbd27fb679b8cc804fa971f425fa16dfb91ad62aef7ce59618df939ff0f170f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C8D 5664 bytes
font_01_sfnt_off00012fcc.bin
486f2200201dbc4420bed5b6040bc0b70c62dd58dd5abc235aa4deea3f933329		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCC 11244 bytes

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