Malicious PDF — malware analysis report

Static analysis result for SHA-256 bacbbc9fce17c40b…

MALICIOUS

PDF

72.3 KB Created: 2021-03-11 13:40:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74f72bf527c887c455a563c6f82fa429 SHA-1: 74c33fde65f2455e1c26fbf7f7daad6abc549009 SHA-256: bacbbc9fce17c40b9c23a37b728153e0d2008c3faa0f23c04b1a6821bd2e0e5e
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, https://jumiwimov.ru/123?utm_term=worksheet+before+double+click, suggests a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs point towards a potential download or redirection mechanism, commonly associated with phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/123?utm_term=worksheet+before+double+click
    • http://vasakuso.sportsontheweb.net/wemopojitixazubep.pdf
    • http://roduvogixaxo.66ghz.com/authorization_format_header.pdf
    • http://rujajabejeveto.66ghz.com/86884649779.pdf
    • http://viwesisikumebi.getenjoyment.net/intimate_apparel_play_script_online.pdf
    • http://risumeboze.getenjoyment.net/kivonimovomite.pdf
    • http://bokegaf.22web.org/77495081379.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d991b114-4190-4bb4-acf6-e65f7f470001/23773018389.pdf
    • https://uploads.strikinglycdn.com/files/e3095104-edca-4339-b381-72c4311984b7/simple_and_compound_interest_problem_with_solution.pdf
    • http://jodofinefurow.rf.gd/how_to_draw_a_rose_flower_very_easy.pdf
    • http://nekegax.epizy.com/strategic_marketing_definition_and_importance.pdf
    • http://kinikodiraxo.rf.gd/comprehension_for_class_1_worksheet.pdf
    • http://wuwopuwanilepi.epizy.com/bared_to_you_audiobook_free.pdf
    • https://86908e24-11f3-43a1-9346-bf531f45ee0b.filesusr.com/ugd/97493d_9b5bdbbe989941a395bd6327279ee286.pdf?index=true
    • http://kepewitibafef.myartsonline.com/sing_alleluia_marcelo.pdf
    • https://a7474f5d-6ec7-41e4-954d-8cb0a6a0c5ec.filesusr.com/ugd/b987d2_60266a5864574965917d140d6170cca7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/100e0219-4865-43c6-91d9-e4c53767d70f/kejagumevuwukuvoto.pdf
    • https://7ffe38df-ef78-47a1-8632-a9c579db478a.filesusr.com/ugd/8ff694_7cd155bbb3ea4951a3fb8f87deb3ab43.pdf?index=true
    • https://3caa4030-7dd6-4be4-8a8a-e1981c45b3cd.filesusr.com/ugd/704988_a78180d412354c9a8fe054cbcac9ce6f.pdf?index=true
    • http://xunevonobi.epizy.com/argumentative_essay_template_examples.pdf
    • http://govujetimavex.epizy.com/karijulox.pdf
    • http://jemejuzot.epizy.com/xowuli.pdf
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_3def3c4648224b249f324e491582b930.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fe99d620-d936-4d74-b90c-8c49460cddb4/honda_rebel_300_review_2017.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_off0000dd91.bin
eb21ea52f090617d07da6281fa7089c753b37215b3960521a1e1f23785b60ec3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD91 5116 bytes
font_01_sfnt_off0000ef05.bin
8be6d3a7de2fa49ee70da51ef3d51a8a2c64fa8cfe22bf6b479f105dfcd94ffb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF05 10812 bytes

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