Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb71cb4c8b136996…

MALICIOUS

PDF

77.0 KB Created: 2021-02-27 17:41:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7f6324873f6b2f9b6e9ee4330f958537 SHA-1: 94bac08255be1029ae27f3838d4c068efc094c56 SHA-256: cb71cb4c8b1369964580fa2e961f8a92e164961ef8baf061f3a93afc8e998143
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The embedded URL, https://zajinet.ru/wix?keyword=sniper+assassin+unblocked+3, suggests a lure to a malicious website, likely for credential harvesting or further malware delivery. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', suggesting it was generated by a tool rather than a legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/wix?keyword=sniper+assassin+unblocked+3 PDF link annotation
    • https://cdn.sqhk.co/jepipovi/1gjiAt3/19340799792.pdfIn PDF document text
    • https://cdn.sqhk.co/muditazu/hlge3hh/cruise_travel_agents_online.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/Ejj6pEV/miami_dade_covid_dashboard_school.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/g5jiTjh/11867075795.pdfIn PDF document text
    • https://cdn.sqhk.co/lupekute/ggcuqfv/36560515940.pdfIn PDF document text
    • http://kulanefimolon.mypressonline.com/diccionario_larousse_descargar.pdfIn PDF document text
    • https://cdn.sqhk.co/tebefaravuz/jhA4jhR/switch_controller_on_pc_fortnite.pdfIn PDF document text
    • http://lenuvivureropi.scienceontheweb.net/fupanimejexamopeboja.pdfIn PDF document text
    • https://cdn.sqhk.co/dinigivo/hhciegl/35968126339.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/satuja/remubufove.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/88645854949.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/gujarati_attitude_status_app.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/how_to_write_a_description_of_food_blog.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/what_are_the_rules_of_private_international_law.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/77204325249.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/79661688769.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/amelia_jane_enid_blyton.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/alexa_app_apk_file.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/annual_performance_review_salary_increase.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE425 5540 bytes
SHA-256: 886ef8ea6a8c2dfabcf0155299f715c537c14fb8c707de4409bc52a6f78cb137
font_01_sfnt_off0000f700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF700 15592 bytes
SHA-256: 403f5a597d7f11fa8c258235fad4a2c8eea7ddc308bfddad6c8d27f99c80257a

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