Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fcedd95a75538f6…

MALICIOUS

PDF

68.9 KB Created: 2021-02-24 14:07:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5afada0558aded21ec765fb992139b9 SHA-1: 1b8ef6d9917f4644758d9105516a5ec74dfd3339 SHA-256: 3fcedd95a75538f6e3d3ebeea3d95d7d832a77ab67f19595424c62424c0250a6
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, with a high risk score. It contains an embedded URI pointing to 'leonvi.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, suggests a lure related to 'poetic devices worksheet 5', indicating a social engineering attempt.

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://leonvi.ru/wix?keyword=poetic+devices+worksheet+5
    • https://domemasajexal.weebly.com/uploads/1/3/5/3/135304114/nenukuj.pdf
    • https://cdn-cms.f-static.net/uploads/4445745/normal_601460cdcb84a.pdf
    • https://static.s123-cdn-static.com/uploads/4471706/normal_5febdc5e1f321.pdf
    • https://detaxotipag.weebly.com/uploads/1/3/4/7/134730838/jerevuzilob.pdf
    • https://static.s123-cdn-static.com/uploads/4419827/normal_5fe29e643f9ad.pdf
    • http://fepimedofosi.iblogger.org/61696362934.pdf
    • https://cdn-cms.f-static.net/uploads/4393190/normal_602a9bdcba5a0.pdf
    • https://liwuvena.weebly.com/uploads/1/3/1/3/131398027/e22221f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fojaxexino/ergonomic_assessment_form.pdf
    • http://gunijeru.rf.gd/regular_present_tense_verbs_spanish_list.pdf
    • http://kuxomexepus.epizy.com/nikon_3-9x40mm_prostaff_rimfire_w_bdc_reticle.pdf
    • http://keladosa.epizy.com/98491569418.pdf
    • http://sunosazogefot.epizy.com/52534087097.pdf
    • http://kawojimulogizef.rf.gd/gezak.pdf
    • https://s3.amazonaws.com/zatasipezeg/zozutumifedinu.pdf
    • https://s3.amazonaws.com/zatasipezeg/better_apartment_guidelines_victoria.pdf
    • https://s3.amazonaws.com/mejawiwomak/information_about_all_planets.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_off0000d199.bin
7fca24295b47911a6d2a8fba92bca8e8d9f8d3c69d8e422124b93e74f0a0d8eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD199 5124 bytes
font_01_sfnt_off0000e324.bin
a173a6df1b82f50f920402bd8c636c30bb9fa00cbe34314f812595f21607eade		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE324 10444 bytes

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