Malicious PDF — malware analysis report

Static analysis result for SHA-256 23a3e353bca1d1b8…

MALICIOUS

PDF

80.6 KB Created: 2021-03-17 08:47:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9d32bfa7721487778a45713e60b1c6a SHA-1: 58ec54ca370cc93c89eb6f4c1543a1280441171d SHA-256: 23a3e353bca1d1b88a71c29b33f988fb9b5ed14d8929b9b0ab90be2aa1dec12e
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 as a phishing lure for a 'CPS employee online portal'. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of an external URI suggests the document's primary purpose is to redirect users to a malicious site, likely for credential harvesting or further malware delivery.

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://golowaki.ru/wix?keyword=cps+employee+online+portal
    • https://cdn-cms.f-static.net/uploads/4499651/normal_602fce941d0a8.pdf
    • https://dubanivexog.weebly.com/uploads/1/3/4/3/134331992/gunodirelejavirasu.pdf
    • https://static.s123-cdn-static.com/uploads/4380384/normal_5ff71b01991e7.pdf
    • http://kuliwegi.sportsontheweb.net/60837866290.pdf
    • https://static.s123-cdn-static.com/uploads/4386613/normal_5fffc4b8917c3.pdf
    • https://static.s123-cdn-static.com/uploads/4388065/normal_5ff612cbc2d10.pdf
    • https://sabidodavo.weebly.com/uploads/1/3/1/4/131408103/3d86533f88.pdf
    • http://beviluxenumiliv.mywebcommunity.org/87424045597.pdf
    • https://kexarofewif.weebly.com/uploads/1/3/4/5/134505099/pudavaxozux.pdf
    • http://fisujerekuvij.getenjoyment.net/what_does_spectrum_code_s0900_mean.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tebuwawezizafes.onlinewebshop.net/they_say_i_say_free_online_book.pdf
    • http://damowepoko.myartsonline.com/kibawit.pdf
    • https://ed36ca5d-e6e9-4caf-8bbb-3a8af5cfee16.filesusr.com/ugd/971556_b16ae490fd494a9da8d136b167815fd2.pdf?index=true
    • http://suvalomimo.atwebpages.com/weight_watchers_by_conair_4-user_memory_glass_body_analysis_scale.pdf
    • https://s3.amazonaws.com/nijosinizo/anemia_menurut_who_terbaru.pdf
    • http://zipemoluligera.myartsonline.com/tosejadanavemevebonaxox.pdf
    • https://s3.amazonaws.com/fuzafuzeruwit/70910816898.pdf
    • https://fac30f9c-1bc3-4ff6-ac40-7ced1d2a170b.filesusr.com/ugd/3b7182_af60719254b544ef8c1382a04bdda8a0.pdf?index=true
    • https://s3.amazonaws.com/legenapi/harry_potter_movies_freeform.pdf
    • https://s3.amazonaws.com/gogoxowiniza/how_do_i_enable_hr_on_my_fitbit_inspire_2.pdf
    • http://timojodabemisux.myartsonline.com/tappan_gas_oven_parts.pdf
    • http://ratobewiwigu.atwebpages.com/basic_english_grammar_teacher_s_guide_third_edition.pdf
    • https://cps.edu/Pages/Staff.aspx
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e736.bin
dfc33d339cbea5ce3f353bb52fde0a572d945adc2cf709070e9c96a195fde4fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE736 4972 bytes
font_01_sfnt_off0000f807.bin
49740d24d05d740124aef9229952af11d644fcf44a6e1a1113d3cb8dd5e3075c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF807 11792 bytes
font_02_sfnt_off0001203e.bin
7ccd8150e2c48a9748994740f2a0713563e2bc66516285f786c138bc0577823a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1203E 16088 bytes

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