Malicious PDF — malware analysis report

Static analysis result for SHA-256 f733b1a6f73427bd…

MALICIOUS

PDF

70.9 KB Created: 2021-03-25 02:41:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff5331fbd97ab77983615f19941d1a2a SHA-1: 1806dacd5dc77b1f84b43096157ed53ba65e274f SHA-256: f733b1a6f73427bdbb6fa4d94db3b49ddd131d24c1f15347cb3c9dabd3fcf7ea
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading further malware or providing sensitive information. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external URLs strongly suggests a phishing or credential harvesting scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/award?keyword=oxford+phonics+world+1+teacher+book+pdf
    • http://1fps.ru/darktrace_dcip-_m_datasheetijlzk.pdf
    • http://stassikorskyi.com/photosynthesis_whats_in_a_leaf_pack5c03a.pdf
    • https://cdn.sqhk.co/goluxewimabu/bhcNhjh/save_the_light_steven_universe_pc_download.pdf
    • https://cdn.sqhk.co/ferobisuw/igdEAjf/candy_crush_saga_download_for_pc_filehippo.pdf
    • http://nakrutkavk.site/kopiguxupixuboshr2o.pdf
    • http://choosemadam.site/walmart_open_tomorrow_morningi5ez5.pdf
    • https://cdn.sqhk.co/tamejenonisi/mwjee5I/oof_button_app.pdf
    • https://nugukijozagesek.weebly.com/uploads/1/3/0/7/130739433/a65909986.pdf
    • https://lozepexowazabi.weebly.com/uploads/1/3/1/4/131409761/2123776.pdf
    • https://vubumemor.weebly.com/uploads/1/3/4/0/134012760/1db9672d1019729.pdf
    • https://cdn.sqhk.co/mivadunoxo/gfdifgi/bluestone_and_hockley_reviews.pdf
    • http://latutuvifem.22web.org/real_estate_company_profile_sample.pdf
    • http://potaberukogox.66ghz.com/destruction_warlock_pvp_guide_bfa.pdf
    • http://lufusozajufa.22web.org/imovie_trailer_template.pdf
    • http://uscovidcharts.com/878461111816j7ld.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/61c39007-dd0f-4ad4-92cf-721d5b881306/jujumopegupetuwike.pdf
    • https://uploads.strikinglycdn.com/files/0a26e72b-e2cf-4203-9feb-22c2e30078f2/fiwibeb.pdf
    • http://bovubodomumid.epizy.com/whatsapp_gb_apkpure.pdf
    • http://widabuve.epizy.com/69913283112.pdf
    • https://uploads.strikinglycdn.com/files/034e94ac-934e-4a13-9dbf-5d85a2352616/91105934773.pdf
    • http://mijekobafenado.rf.gd/blank_linkedin_profile_template.pdf
    • https://uploads.strikinglycdn.com/files/abba6109-733f-464b-9290-9b37d493e5a0/71963917132.pdf
    • http://tijasewe.rf.gd/5192729964.pdf
    • http://nenilezum.epizy.com/70006573488.pdf
    • http://fivamoxopel.epizy.com/birupopewebaton.pdf
    • http://zuzesideb.epizy.com/wenojisolugi.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_off0000d3b7.bin
2defb720ff983c6e220c19965b58f9da538824b083e11f7b03a872b4e0be0dcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B7 5688 bytes
font_01_sfnt_off0000e72b.bin
e24c78cbe8edd7e6cfe64d653c9d5417bd7a3c621ef68219586cff9004924ff8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE72B 12288 bytes

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