Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3b970c5279d209b…

MALICIOUS

PDF

176.3 KB Created: 2021-03-17 10:11:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aba8861e6522e81172bc22dce67f7305 SHA-1: 0188ceec2eb71c060a107d6e7deabe09ce288cf0 SHA-256: f3b970c5279d209ba9417bd17a797eb3578a55e5c1472bf55842e1b0a23d9882
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL `https://nipisod.ru/wix?keyword=outer+sailor+scouts+names` suggests a phishing or credential harvesting attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/wix?keyword=outer+sailor+scouts+names
    • https://cdn.sqhk.co/muwazubivotu/CXghjgv/9523668991.pdf
    • https://cdn-cms.f-static.net/uploads/4368500/normal_60334ff40ec28.pdf
    • https://static.s123-cdn-static.com/uploads/4471995/normal_5ff4a57248063.pdf
    • http://lajodibibodi.getenjoyment.net/cancionero_navideo_cristiano.pdf
    • https://cdn.sqhk.co/novoganug/igjbhch/12909736360.pdf
    • https://cdn-cms.f-static.net/uploads/4452169/normal_5fe8399a4e123.pdf
    • https://cdn.sqhk.co/nobixapo/eyieBhd/game_recorder_app_download.pdf
    • https://cdn.sqhk.co/pijujuweg/dRcjagg/49213244081.pdf
    • https://cdn.sqhk.co/mudemodox/9gghggg/how_to_iron_a_dress_shirt_with_starch.pdf
    • https://cdn.sqhk.co/bexefoboxevi/gB7PifA/universal_remote_control_codes_for_samsung_tv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wenulusevikofa.myartsonline.com/centralised_and_decentralised_curriculum.pdf
    • https://814cba0f-f649-4223-bfe6-7884e6e02b9d.filesusr.com/ugd/c1108c_fb00dfd81fb64398b8afa5f0988d6332.pdf?index=true
    • https://uploads.strikinglycdn.com/files/625259e2-27a4-4abd-9e9a-60a47a94048b/78337655261.pdf
    • https://uploads.strikinglycdn.com/files/4f2f8be8-76a9-4612-8049-3a2f333a7ee7/58965824045.pdf
    • https://ef2e072a-e8a2-4438-804d-cc750be2e2f6.filesusr.com/ugd/6a22cb_d509ed7fbe9141a1987561ffac42a057.pdf?index=true
    • https://44eeb0f0-4dc9-4d8b-b3fd-cc7ace98e90e.filesusr.com/ugd/a083a1_38d81276048641a6bc55f80c52d1fdc8.pdf?index=true
    • https://c78ffd2e-fc3d-4272-86ca-968d835fb7ad.filesusr.com/ugd/0f9ef0_fff6a1424e62486b9ca9bf3deb8a23e7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f11317fd-d352-45de-bcfa-0ab936fde4b9/manual_de_organizacion_dgeti.pdf
    • https://e0271a52-a7af-48e9-8a99-924ce320ec62.filesusr.com/ugd/be5703_aae021d9cd4e4bb6b18b295501c8d0b0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/94614039-ca97-4946-ba79-f5aaa851ba48/john_deere_265_mower_deck_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f398.bin
e6e8956349875dc7a73eaac46ce08a5439899d5a36829c7a2fd7db02161480d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F398 43448 bytes
font_01_sfnt_off000279bb.bin
04370e00b3cd2cd836ed68492a731afe7298417abca8e1f5691562a314347918		 pdf-font-stream PDF embedded font (sfnt) at offset 0x279BB 4972 bytes
font_02_sfnt_off00028a8a.bin
e7e395dc4a3eb4ee94462b79500c74165cac9576916513a6a8bd6d882cce1caf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28A8A 12796 bytes

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