Malicious PDF — malware analysis report

Static analysis result for SHA-256 e84c80d296cb1a64…

MALICIOUS

PDF

80.1 KB Created: 2021-04-18 03:27:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5da61bd0289fdd866fbfd9033a70e598 SHA-1: 18f2d21939595998b75b1a5e49378cef05477d10 SHA-256: e84c80d296cb1a6417151ea17f10e8566518033aa06c9cedc49c2d65165fb286
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'jacksth.ru', which is likely used to host malicious content or phishing pages. The document body, though heavily obfuscated, suggests a lure related to purchasing a game, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://jacksth.ru/strik?utm_term=how+to+buy+old+warcraft+3 PDF link annotation
    • https://cdn.sqhk.co/xegunorasu/iFqlidj/f1_manager_best_drivers_series_5.pdfIn PDF document text
    • https://cdn.sqhk.co/gozawelesutu/cucrgh7/cub_cadet_fun_runner_for_sale.pdfIn PDF document text
    • http://kalusivo.22web.org/pojamokuziwefofa.pdfIn PDF document text
    • https://cdn.sqhk.co/sasibasodiwu/1zeggib/46655418011.pdfIn PDF document text
    • https://cdn.sqhk.co/numobelez/eUAgc1a/android_tablet_with_stylus_2013.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/hannah_montana_forever_episode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/forowatatasaka.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/firestick_free_vpn_apk.pdfIn PDF document text
    • http://pazoluno.epizy.com/jisimoxapig.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/ziroladikerakosiruf.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/windows_10_display_driver_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/what_time_does_walmart_photo_center_close_today.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/355479ef-bf12-4e68-bc62-2468591be8ac/24360668245.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/mesowizorukulonuli.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/bd_comedy_natok_free.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/beckett_oil_burner_air_adjustment_manual.pdfIn PDF document text
    • http://lejemerane.epizy.com/idsa_prosthetic_valve_endocarditis_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/67400638551.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/86235984871.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/42152562378.pdfIn PDF document text
    • http://waraposid.rf.gd/ketogenic_cookbook_plr.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/what_is_theme_in_the_poem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9ac0237-203d-4b61-8a6d-844c1586bba0/82551004542.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8d841e9-6014-48bc-a518-d4e2a5f9fb88/a_christmas_carol_short_version_esl.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/boluvakizuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc7111e0-8e94-4c63-872a-c737b2d5c2a5/libro_la_meta_resumen_por_capitulos.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF350 5296 bytes
SHA-256: 45be713072eda3f6599f3581f666632a4ddadd9fb10b94d9843ae175711a2217
font_01_sfnt_off0001057c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057C 13724 bytes
SHA-256: ca8cc47c5e676c90ad0c574d6304475fe76b11f04864f7c2fa5eeaf2d7d04e89

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