Malicious PDF — malware analysis report

Static analysis result for SHA-256 5632bbf03bbfd7b9…

MALICIOUS

PDF

77.4 KB Created: 2021-04-06 23:21:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2cd324893020ea83c4f9086a75904de SHA-1: 7c8b2f350f2fa6644c0dc4504bc9e1b9e69f4fe4 SHA-256: 5632bbf03bbfd7b9d507dd4373744c9c4d01f4d8dd3516ce3ff8e397913319e6
144 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of an MFA lure heuristic suggests an attempt to harvest credentials or session tokens. The embedded URL points to a suspicious domain, likely serving as a delivery mechanism for a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mezovuduw.ru/strik?utm_term=how+do+i+change+the+battery+in+my+adt+safewatch+pro+3000+keypad
    • http://storeplus.pro/chromecast_user_guide3dzkg.pdf
    • http://topcabinets.xyz/how_to_design_a_dd_one_shotcsx7s.pdf
    • http://e-devletturkiyeaidatsistemimgovtr.com/52167013356fwii9.pdf
    • http://kupelobivinix.22web.org/xemegefovine.pdf
    • https://cdn-cms.f-static.net/uploads/4383806/normal_603b0fd27f23b.pdf
    • http://nextauto02.ru/pejezixotejunob74fbx.pdf
    • http://itanto.space/potiwugaxobukogepamok8qcts.pdf
    • https://static.s123-cdn-static.com/uploads/4367000/normal_5feeb17c24bea.pdf
    • https://cdn-cms.f-static.net/uploads/4365639/normal_60672a83e9c8f.pdf
    • https://cdn-cms.f-static.net/uploads/4447641/normal_603d2e7e070cf.pdf
    • http://hookup756.fun/spanish_preterite_and_imperfect_testqec2e.pdf
    • http://voicebftyi.com/sig_sauer_p226_holster_ukg46wh.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vovuzize/osha_510_occupational_safety_and_health_standards_for_construction.pdf
    • http://rizusuzapil.rf.gd/72675689993.pdf
    • https://uploads.strikinglycdn.com/files/a9c42590-c50a-4bd5-bf66-b38dba581e7f/understanding_analysis_abbott_solutions_manual.pdf
    • https://s3.amazonaws.com/loranoduzuja/nudinaxabalerevikozelu.pdf
    • https://uploads.strikinglycdn.com/files/43123e2f-fb98-4bbe-b512-02461a28939e/how_does_evening_primrose_oil_help_induce_labor.pdf
    • https://s3.amazonaws.com/naxozelozude/tafavubufopobemojajavat.pdf
    • https://uploads.strikinglycdn.com/files/a2adad7b-bd74-4432-89df-b744fde38120/dazarafufaj.pdf
    • https://s3.amazonaws.com/pulujolatepuv/annabelle_2_rating_parental_guide.pdf
    • https://s3.amazonaws.com/tosevud/aws_rds_aurora_cloudformation.pdf
    • https://uploads.strikinglycdn.com/files/bf3b75c8-dd0f-414a-babf-934c0981353d/2017_honda_civic_turbo_maintenance_schedule.pdf
    • https://uploads.strikinglycdn.com/files/490826cc-7d83-45fd-9f20-6108fa0da8fb/can_you_get_military_training_as_a_civilian.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_off0000ecef.bin
8c1b94dfbe2ad61dc92a5efee25161d64044bd9b1c94e371adfb06e91eb0a1c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECEF 6204 bytes
font_01_sfnt_off000101f1.bin
2062caab73dee02353e2813ed3dca699481b973f83badcc3f804fd969ae822cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101F1 10916 bytes

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