Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eaa2249328a14c1…

MALICIOUS

PDF

86.7 KB Created: 2021-03-28 23:19:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfd04cbb6537aa6b10d1190ac4cbdafd SHA-1: 513c9b6fe8fd78e2ad04ffd95110d98ea9e412a6 SHA-256: 2eaa2249328a14c1df0ee09f565b13f7150ed5e97a4c8a4132e411f9812c1c10
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to 'vilenefex.ru', which is a strong indicator of a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect the user to a potentially harmful external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://vilenefex.ru/wix?keyword=apk+emoji+ios+13
    • http://tudiweva.22web.org/willy_wonka_and_the_chocolate_factory_cast_now.pdf
    • https://cdn-cms.f-static.net/uploads/4368230/normal_602aaf8869b24.pdf
    • http://kifenefazujiz.iblogger.org/line_drawing_techniques_worksheet.pdf
    • https://static.s123-cdn-static.com/uploads/4501484/normal_5fc5c850305d2.pdf
    • https://refanoripusegu.weebly.com/uploads/1/3/4/3/134306014/ca75ff9ead2e46d.pdf
    • https://piguvedulo.weebly.com/uploads/1/3/4/7/134724556/mogeruxunaxenokid.pdf
    • http://likododolokopaj.iblogger.org/nilelabili.pdf
    • http://fegebekuxew.22web.org/civ_6_egypt_strategy_guide.pdf
    • https://fawirato.weebly.com/uploads/1/3/5/3/135392883/filoladi_xolosuwidikamek_rubed_ririzoxemijigu.pdf
    • https://tuwunofibe.weebly.com/uploads/1/3/4/6/134657164/rununutinimebij.pdf
    • https://bovitala.weebly.com/uploads/1/3/4/4/134497817/dujefitalipesasux.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dofufiri/35410615656.pdf
    • https://uploads.strikinglycdn.com/files/48dff0c4-4dce-4b50-8710-238e365b5e1a/como_hacer_el_taller_mecanico_automotriz.pdf
    • https://s3.amazonaws.com/jivala/50072100498.pdf
    • https://s3.amazonaws.com/safenalavojuwu/argumentative_essay_conclusion_examples.pdf
    • http://puzexexaniledow.epizy.com/wosekudonekidojuduvojuse.pdf
    • http://luvebex.rf.gd/89091145864.pdf
    • https://uploads.strikinglycdn.com/files/b8dce0b5-1b98-4d24-9355-0adef4b7c758/5th_edition_character_sheet_json.pdf
    • https://s3.amazonaws.com/tazopaju/free_worksheets_for_beginning_esl_students.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaed.bin
c10255b249fed5b177459efd2182e5d6b904eeb588bf3eb605b924e6a4b8323b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAED 4972 bytes
font_01_sfnt_off0000fbd6.bin
dc9e280e3716534d7d9481d6ffebc62e155fc2f51dfa56846bc77caf3facb5e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD6 4232 bytes
font_02_sfnt_off00010b9e.bin
7279b8342b4d3b6e542b4f9d288a0adaca753bbd57c7e623d4fe7e636f9af0e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9E 10340 bytes
font_03_sfnt_off00012f15.bin
be1665bd99c7bd28a4624f47c86531405b4f6a8a9351b1992a19633f02506c95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F15 16524 bytes
font_04_sfnt_off00014569.bin
f0a88f0ebc5209daefb10e1ce02cecb9ab784a7a91854bfb646a3c59a620ceda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14569 1748 bytes

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