Malicious PDF — malware analysis report

Static analysis result for SHA-256 346d1e8f2aa8dba3…

MALICIOUS

PDF

163.8 KB Created: 2021-02-14 12:00:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e4b9bdbddb4362f132f38504bf320720 SHA-1: 98a4549d74edb2f95b67ec05a3729c849e0c3d6f SHA-256: 346d1e8f2aa8dba3d632ea8df8583be4ccf227f12a329c5f7723d69430428911
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a website related to 'trig identities calculus pdf', likely a lure to trick users into visiting a malicious site. ClamAV and an ML classifier flagged this PDF as malicious, indicating a high probability of phishing or malware delivery. No scripts were extracted, but the presence of an external URI suggests an attempt to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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=trig+identities+calculus+pdf PDF link annotation
    • https://cdn.sqhk.co/ruvonusebex/niaZhhe/heroes_evolved_chinese_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401989/normal_601de61e76815.pdfIn PDF document text
    • https://cdn.sqhk.co/mikevoponage/hjfxjcE/brazil_football_world_cup_champions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450427/normal_601a101d651b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383147/normal_5ffdcb628b689.pdfIn PDF document text
    • http://gordei2d.com/c_more_film_tv_guide03xcw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476437/normal_5ffcc6b354e14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529281/normal_5feb9b20c8643.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487186/normal_5ff0602edebbf.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/igifjfr/wifi_driver_for_windows_10_hp_pavilion.pdfIn PDF document text
    • http://form-lnstagramcopyrightservices.com/ates_ve_su_4_1001_oyunqx7lg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421780/normal_5fdb7bc9f12e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369796/normal_5fe1d0533c14e.pdfIn PDF document text
    • https://cdn.sqhk.co/zefafulolit/jegepgc/sirolimus_side_effects_long-_term.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fusifovizit.rf.gd/85653685141.pdfIn PDF document text
    • http://batogejupimole.rf.gd/media_player_for_windows_10_home.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/renaissance_francaise.pdfIn PDF document text
    • http://nawupewiviziwik.rf.gd/gta_san_andreas_cheats_pc_utorrent.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/fast_math_division_worksheets.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00021b78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21B78 5272 bytes
SHA-256: 68b25245a4a7a01ba94cb77aac0105e4850f9908fc5d01551a03900aa9aca792
font_01_sfnt_off00022d7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22D7C 18520 bytes
SHA-256: e7d312cb387dca60ae0f9379835f243ae8900b521826caa58b8c5463f54256d5
font_02_sfnt_off000267c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x267C5 17224 bytes
SHA-256: 4cbb30a546cdcba87da90fa68c24154b83a55ccb99a73ef9d6ea6157689f40d4

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