Malicious PDF — malware analysis report

Static analysis result for SHA-256 318522a402f7fc57…

MALICIOUS

PDF

88.4 KB Created: 2021-03-22 02:12:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: e8d40c2dcd7cd5c7ec0b85e601b52d13 SHA-1: 81ed6fc7e89218957158955d2af41da2d770bd03 SHA-256: 318522a402f7fc578628eb6285827995f4641921c9e874b79eee36f6863d22a9
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, with one specifically flagged as external, suggesting it's designed to redirect users to potentially harmful sites. The presence of PDF-specific heuristics further supports its role as a malicious PDF document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/123?utm_term=agonistas+b2+pdf PDF link annotation
    • https://cdn.sqhk.co/nevupediwix/ibieja0/play_store_app_plants_vs_zombies_2_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rumoligodo/jhhakQp/soccer_tactics_ipad.pdfIn PDF document text
    • http://fodamibokaf.66ghz.com/how_to_reset_a_clicker_counter.pdfIn PDF document text
    • http://kuxakutefop.22web.org/what_does_the_heart_of_darkness_symbolize.pdfIn PDF document text
    • http://xivasupati.iblogger.org/ruzezojurazilawa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fozubogedunok.rf.gd/isagenix_9_day_cleanse_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/ruvadexidafimazipopedekit.pdfIn PDF document text
    • https://f6180879-d31b-499c-8e42-fead7842c491.filesusr.com/ugd/007227_de4b697ba65b4bc2bf50babfcd4b2d80.pdf?index=trueIn PDF document text
    • http://rojepubaxogo.epizy.com/bowutafujozikadim.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/inkscape_software_free_download_for_windows_xp.pdfIn PDF document text
    • http://zavukazena.epizy.com/71445203880.pdfIn PDF document text
    • http://jewulepip.epizy.com/fugexuporopewiripagu.pdfIn PDF document text
    • https://25f35837-e8ad-4357-b490-8f69bec4165a.filesusr.com/ugd/96c61c_b0d163a62b554c06899968da7dcbdf68.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mixanaz/sojujijomivixaf.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/how_to_become_dbt_certified.pdfIn PDF document text
    • http://rowofasetadoxu.epizy.com/joined_up_handwriting_templates.pdfIn PDF document text
    • https://e44de090-c64a-4a0f-b555-2784aa0ac37b.filesusr.com/ugd/41d583_a48a4dd94f864038bff5c3e4a7d39ae8.pdf?index=trueIn PDF document text
    • http://mekavebij.epizy.com/moxagafavipebozebabutuko.pdfIn PDF document text
    • https://7ffe38df-ef78-47a1-8632-a9c579db478a.filesusr.com/ugd/8ff694_b57746e59b634c6380e0c57b5279c47e.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFC 5012 bytes
SHA-256: 05890f3b00f135f2ee57e8901fd475225ec3935aba894bd1a0c22550e25a7ab0
font_01_sfnt_off00011d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D14 12300 bytes
SHA-256: 4a63b9071b21f18ed340239e19c8f17cdd2e1f8295cb0ab57b9522e59214b9d3
font_02_sfnt_off0001453a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1453A 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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