Malicious PDF — malware analysis report

Static analysis result for SHA-256 d21bc29c85c47a5f…

MALICIOUS

PDF

78.7 KB Created: 2021-03-15 04:17:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6fb704283e52332ccf620fe1f3f9a382 SHA-1: 3a5f04f2ff8688ad76b560404a83c13d04d3174c SHA-256: d21bc29c85c47a5f7e70c121958c33fcf90facc256e77fb06bd9ca7b70644cb3
144 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was flagged by a machine learning classifier and ClamAV as malicious. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs the user to interact with the clipboard in a way that suggests command execution. The embedded URL points to a suspicious domain, likely intended for payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://leonvi.ru/award?keyword=digital+electronics+basic+concepts+pdf PDF link annotation
    • http://dimax-matrasy.ru/how_to_draw_eyelashes_on_procreatez0hct.pdfIn PDF document text
    • http://repetitor-ru.ru/badenweiler_marsch_notenamsch.pdfIn PDF document text
    • http://nesobaka3.xyz/12583917204w2fci.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461205/normal_5fe9a51c2395f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449974/normal_60105154a6773.pdfIn PDF document text
    • http://neridipazaf.22web.org/schlage_digital_lock_review.pdfIn PDF document text
    • http://yognat.space/lufezetapabeesgi.pdfIn PDF document text
    • http://vumamanepu.sportsontheweb.net/the_road_not_taken_summary_stanza_by_stanza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446045/normal_600c655029af2.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/metakibeme/bangalore_days_songs_free_320kbps.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/10744115711.pdfIn PDF document text
    • https://s3.amazonaws.com/padanivozeb/nunar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51443673-4719-46b5-a469-2da786fc62d7/81521024037.pdfIn PDF document text
    • http://pedojup.rf.gd/cake_mania_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed3482ce-c4df-40d7-b63f-30996c4cfcc2/when_will_walmart_release_black_friday_ad_2020.pdfIn PDF document text
    • http://jujobope.atwebpages.com/geospring_water_heater_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/zejuganovaguxesarodafo.pdfIn PDF document text
    • http://tiredosutozol.atwebpages.com/chromebook_shortcuts.pdfIn PDF document text
    • http://xepevofopi.epizy.com/baldur_s_gate_descent_into_avernus_4chan.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_off0000f638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF638 5464 bytes
SHA-256: dd70b2e6913edc5aa3bf5ca1564144728b9884fbd20ff8fa714eea5aaaa66f1e
font_01_sfnt_off000108db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DB 10744 bytes
SHA-256: 9e8d1dd3e458ec82991670d315994da4163258852cd56e39bc3f71b0c9af466a

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