Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a2207e26d638af0…

MALICIOUS

PDF

76.3 KB Created: 2021-03-24 20:54:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac8a889797bbd2f41c35005baa4b78b2 SHA-1: a21934bb8138772daf06938e53271e49486a0357 SHA-256: 1a2207e26d638af0db773817fbe92b93841cc77af11b485046c5e6aee990999c
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 identified as a phishing trojan. It contains an embedded URL that masquerades as a geometry worksheet, likely intended to trick the user into clicking it. The PDF structure and embedded URI heuristic indicate an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://leonvi.ru/wix?keyword=geometry+dividing+radicals+worksheet
    • https://static.s123-cdn-static.com/uploads/4459166/normal_5fc82ad113ed9.pdf
    • https://cdn.sqhk.co/vunelebu/jHja5ie/76300714630.pdf
    • https://cdn.sqhk.co/zupuguvawaj/T1WiEsW/vubugu.pdf
    • https://cdn-cms.f-static.net/uploads/4486346/normal_603b17da34b69.pdf
    • https://cdn.sqhk.co/fefowofuk/gdgefaB/snow_white_with_the_red_hair_characters.pdf
    • https://cdn.sqhk.co/vajegipofuz/iieidH8/astrologian_divination_guide.pdf
    • https://cdn-cms.f-static.net/uploads/4468289/normal_602ce5417f538.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d159b2cd-8fa0-4995-a6db-d79e229aa416/should_i_read_the_books_after_watching_game_of_thrones.pdf
    • https://387a498e-9551-4239-9507-3183ba214552.filesusr.com/ugd/cd403b_c4f83ea24c34494eb0e52d238d77ee76.pdf?index=true
    • http://kizilobizewepog.epizy.com/13067268828.pdf
    • https://uploads.strikinglycdn.com/files/5c53881a-d682-4f55-8ad2-3e58a5e8105f/widotovanezagixen.pdf
    • http://xilijimerufosat.rf.gd/nufif.pdf
    • https://uploads.strikinglycdn.com/files/73f3f98b-37f9-46bb-a0d9-7991ab2319d6/who_ignore_you_quotes.pdf
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_60846b23bdcf4e379235906616ec38ba.pdf?index=true
    • https://689a2394-1721-4ce0-b6f7-af9f1dc0d621.filesusr.com/ugd/0f5b72_abc1973897b7407a8358770303ef8ff7.pdf?index=true
    • https://e4034479-4ead-418b-af8c-5be8dc72bdbe.filesusr.com/ugd/1e8759_10d30b4864bb45f88b0dbabe551827e9.pdf?index=true
    • https://a04ad255-06d6-4b17-97e7-91173d300295.filesusr.com/ugd/6864df_2c911971f5d0489aa689f9346fa8081b.pdf?index=true
    • http://nilidori.rf.gd/zomilaxoroved.pdf
    • http://taxobanovozixum.rf.gd/professor_key_to_bank_job_book.pdf
    • http://retuguru.epizy.com/wezefuzumigesato.pdf
    • https://167c8e7b-8160-49a2-a88e-f26749d647c8.filesusr.com/ugd/1ad47d_c218fa0f5bbd47298f52157ac7a0426b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4fb6d61d-8d43-4638-bc2d-4bbbb2922170/ganetaziwope.pdf
    • https://99470c7d-c692-4648-a7b8-36ea19db2883.filesusr.com/ugd/ab059d_deff720da47840af924f2867374b8e77.pdf?index=true
    • 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_off0000ebea.bin
ae509c796d40965f744d1621c50b04029b1d35f9cb1a6d649b10165e67b8d2d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEA 5700 bytes
font_01_sfnt_off0000ff43.bin
dc1357c4c917055e052d5f9f99bb4338c8773a5b5742a477ed9de753ea2a27b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF43 10656 bytes

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