Malicious PDF — malware analysis report

Static analysis result for SHA-256 c527903234031b36…

MALICIOUS

PDF

80.5 KB Created: 2021-03-20 06:00:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d40ca7467b81ef2ee1e9226c0cd22935 SHA-1: 64597e72f20a45f5e333efcbd33f1ee006ee2555 SHA-256: c527903234031b3619896dfa74b08b8d4593246d8c62cfa0d265144e7e8c988b
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as a phishing trojan. The document body, though heavily obfuscated, includes text related to 'Dyson dc25 ball problems', suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://botokaw.ru/strik?utm_term=dyson+dc25+ball+problems
    • http://sks-expertiza.ru/belkin_modem_router_setup7ie4l.pdf
    • https://cdn-cms.f-static.net/uploads/4446147/normal_6036831f8b096.pdf
    • https://static.s123-cdn-static.com/uploads/4500883/normal_5ffa069202c5c.pdf
    • https://cdn.sqhk.co/pepegizeso/ihjjDig/ates_ve_su_4_meb_ataturk_ortaokulu.pdf
    • https://cdn.sqhk.co/febapaji/aQMgfjh/top_weapons_real_gun_sounds_effects.pdf
    • https://static.s123-cdn-static.com/uploads/4383138/normal_5fff5e80f271c.pdf
    • https://cdn.sqhk.co/kawurefeki/ljcjjf5/kejeruru.pdf
    • https://cdn-cms.f-static.net/uploads/4390383/normal_600d2563a49b8.pdf
    • https://static.s123-cdn-static.com/uploads/4454289/normal_5fcef9c7efaf0.pdf
    • https://cdn-cms.f-static.net/uploads/4488842/normal_602616bbc945d.pdf
    • https://static.s123-cdn-static.com/uploads/4461234/normal_5fc6ad206b314.pdf
    • http://gtomishebs.xyz/23702152723a62xi.pdf
    • http://sberetransfer.online/bus_games_free_full_versionwkfy9.pdf
    • https://cdn-cms.f-static.net/uploads/4419002/normal_601fd7bf49e51.pdf
    • http://raisinsapp.pro/samsung_m2825dw_toneryptrr.pdf
    • https://cdn.sqhk.co/dutudovajud/ifheidR/67892521535.pdf
    • https://static.s123-cdn-static.com/uploads/4443619/normal_5fd063f9c613e.pdf
    • https://cdn-cms.f-static.net/uploads/4387938/normal_60526329b3057.pdf
    • https://static.s123-cdn-static.com/uploads/4418984/normal_5ff713bac035e.pdf
    • https://cdn-cms.f-static.net/uploads/4455881/normal_600eac582aad1.pdf
    • http://damvglaz2.xyz/g_shock_watches_for_salest95u.pdf
    • https://cdn.sqhk.co/sipebesoxu/gjpcJjg/tozogivubimafoduvoge.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3c3e9534-b2a3-4ebc-9009-bebde4b05ec8/joxipenejanu.pdf
    • https://uploads.strikinglycdn.com/files/1028799d-9764-43a3-ad22-ab8b28d723a9/zevororevag.pdf
    • https://uploads.strikinglycdn.com/files/a16a6067-fbb8-40ef-a181-1ba72652250d/how_to_do_literal_equations_with_only_variables.pdf
    • https://uploads.strikinglycdn.com/files/8ea9926c-79d7-4af3-b243-da4b6e3db5c7/jomuvuverurejemima.pdf
    • https://uploads.strikinglycdn.com/files/a7f120d2-ed57-452c-91ca-abe00a525f97/1874670038.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_off0000f808.bin
6e164846dd4a84471a16a1a7b69ffdfafb179eab3e66e195dbd6c5f39bc7171c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF808 5716 bytes
font_01_sfnt_off00010b79.bin
65dcb2d840d339618c07f932e2d30725509f7539d7c23bbf01526933dafd8484		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B79 12816 bytes

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