Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3e12ed22dd14fe5…

MALICIOUS

PDF

153.7 KB Created: 2021-03-14 12:09:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1288c74ae051a0afde55a8410b38503 SHA-1: ed29d246b0b60de9dc06ce1f6da7a8f482de1fc8 SHA-256: f3e12ed22dd14fe5123c6f8ad73a5170bf8d4b6b9baf6fb6e82d90e42e73cc11
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to 'https://kuzutuzo.ru/wix?keyword=seeley+booth+son', which is a strong indicator of a phishing or malware distribution attempt. The PDF structure itself does not contain readable content, but the presence of the external URI is sufficient to infer the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/wix?keyword=seeley+booth+son
    • https://cdn.sqhk.co/peposusuwi/Phdgcig/amplified_bible_classic_edition.pdf
    • https://cdn.sqhk.co/nowavutu/Ihciehg/whispering_pines_nc.pdf
    • http://nogefiri.iblogger.org/editable_family_chore_chart_template.pdf
    • http://nevozepamuj.iblogger.org/the_expanse_season_5_cast_episode_2.pdf
    • https://cdn.sqhk.co/tevosenijosu/ibM3TMD/39922583311.pdf
    • http://jufanurozud.getenjoyment.net/9759002547.pdf
    • http://pixunune.sportsontheweb.net/5780868497.pdf
    • https://cdn.sqhk.co/nokulebepoba/ji1Zge2/totugawizegolu.pdf
    • https://cdn.sqhk.co/kekumumaxow/jHgjn8Z/koala_bear_grill_galt.pdf
    • https://cdn.sqhk.co/desogepupema/iiegetD/movistar_team_2020_bikes.pdf
    • https://cdn.sqhk.co/gixelotopa/hhbqbNE/7584771149.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://linexiziretewoj.rf.gd/tuzifenovopigaxedukozavo.pdf
    • https://s3.amazonaws.com/litunux/20698906685.pdf
    • https://s3.amazonaws.com/bokelur/niv_bible_study_guide.pdf
    • https://s3.amazonaws.com/tuzamada/idioms_worksheets_with_answers.pdf
    • https://uploads.strikinglycdn.com/files/2193356d-ea64-4f2b-bb7e-f1231de1ff59/does_top_secret_clearance_look_at_medical_records.pdf
    • https://uploads.strikinglycdn.com/files/c38452da-ed22-4b25-916b-e913fd67d68c/robert_greene_40_laws_of_power.pdf
    • https://uploads.strikinglycdn.com/files/58a0004d-2b8a-422d-bbf0-8daac39a2c32/31919752681.pdf
    • https://uploads.strikinglycdn.com/files/08a16ede-16e9-4999-abdc-ef21a01103ac/48553155168.pdf
    • https://s3.amazonaws.com/xetasif/gujazitodogovuf.pdf
    • https://uploads.strikinglycdn.com/files/aa45fedd-5873-4290-acfb-c6697e052f43/adding_and_subtracting_complex_numbers_worksheet_answers.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_off000221e2.bin
1cb70b0499cec5eefce56cf70d63d64df9dc33ff0851e4b7ff214519e1977cb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x221E2 4812 bytes
font_01_sfnt_off00023243.bin
1d2c8013dfa9dae28d6f1850f91ccff3f0b9817c1795687bfa3bdf3e4c30eae5
pdf-font-stream PDF embedded font (sfnt) at offset 0x23243 11604 bytes