Malicious PDF — malware analysis report

Static analysis result for SHA-256 19287a213fb23c0e…

MALICIOUS

PDF

80.9 KB Created: 2021-04-01 11:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e6ce29c483d8e6a946899311998c4184 SHA-1: 27b293e905fc5439408f2050e9d0dcdf50a7068a SHA-256: 19287a213fb23c0e4c8444421a45b1eea57ecdee23b954ab94e17abb27644882
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, vilenefex.ru, which is likely used to host malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to a search query, suggesting a social engineering lure to drive traffic to the malicious URL.

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://vilenefex.ru/strik?utm_term=can+ps3+bluetooth+headset+work+on+ps4 PDF link annotation
    • https://cdn.sqhk.co/loganidob/fyTgghh/wuvozovax.pdfIn PDF document text
    • http://lestyprin.online/bash_script_input_variable_from_filetyvji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466376/normal_601e82e07a6bf.pdfIn PDF document text
    • http://naykaryadom.fun/lelurosejujimebuzuvibemruq3p.pdfIn PDF document text
    • http://summerita.fun/25337757313p0rbp.pdfIn PDF document text
    • https://cdn.sqhk.co/nurijodefa/jTBNqhd/comedy_central_roast_2020_air_date.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481411/normal_6040ac4342c2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384150/normal_6062115c2028f.pdfIn PDF document text
    • https://cdn.sqhk.co/gixegusu/hbiiaih/snow_white_and_the_seven_dwarfs_characters.pdfIn PDF document text
    • https://cdn.sqhk.co/letojeka/F05WPja/8512536975.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369185/normal_603bdeff96a5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406216/normal_600c262f4b95a.pdfIn PDF document text
    • http://kinokaiff.space/chinese_pattern_vector_freene1f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473954/normal_603bc7b37410f.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluniziwav/Nc9gegd/lejezovagabibebejowujadan.pdfIn PDF document text
    • https://cdn.sqhk.co/pabefidinaz/EVCgjex/4941064005.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/iej9ojh/72436698249.pdfIn PDF document text
    • https://cdn.sqhk.co/xaselavub/ifeQF4Q/cupcake_recipe_from_scratch_vanilla.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414848/normal_60561b187b787.pdfIn PDF document text
    • https://cdn.sqhk.co/xanovika/IT1ejfk/88271545438.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/aab8e0a7-4403-44e4-98f0-5b4580d7677e/likireroxurefu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e13b332b-c553-44f1-b923-c09cb1432f83/cambridge_igcse_chemistry_past_papers_answers.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_off0000fe99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE99 5500 bytes
SHA-256: e2e88421b58d9d8bcd96e2696afbc288058c85548d627f8239447f2d7132ddde
font_01_sfnt_off0001114b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1114B 10864 bytes
SHA-256: 994470ba4b4b055d03fbcf7c735af320c7b689e5235fb911f0211434086039c0

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