Malicious PDF — malware analysis report

Static analysis result for SHA-256 6defeb3db679eed9…

MALICIOUS

PDF

79.0 KB Created: 2021-03-29 00:25:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8dc297db784c02b1a34d95934e48e745 SHA-1: b904d1d02cfaa164c9354f1740ca70176cd6390b SHA-256: 6defeb3db679eed9d9d01b667e3d4259a08241304909edd908b60ae69aa1ac72
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://jumiwimov.ru/strik?utm_term=nzxt+h440+review', which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a review topic, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jumiwimov.ru/strik?utm_term=nzxt+h440+review
    • http://xuxetosufuzo.getenjoyment.net/descargar_audio_biblia_reina_valera_1960_mp3.pdf
    • https://static.s123-cdn-static.com/uploads/4418778/normal_5ff434e4bc49b.pdf
    • https://cdn-cms.f-static.net/uploads/4449395/normal_604f99684f943.pdf
    • https://cdn-cms.f-static.net/uploads/4456676/normal_604497207535f.pdf
    • https://cdn-cms.f-static.net/uploads/4459939/normal_605d7c74e7f79.pdf
    • https://cdn.sqhk.co/lomekojop/hezoTge/duxizemu.pdf
    • https://static.s123-cdn-static.com/uploads/4493876/normal_5ff1d0549ee69.pdf
    • https://cdn.sqhk.co/venitalobeni/jdvjeg3/rock_outcropping_pictures.pdf
    • https://cdn-cms.f-static.net/uploads/4465557/normal_6047bc6dd2b83.pdf
    • https://cdn-cms.f-static.net/uploads/4415936/normal_600c3b722c434.pdf
    • https://cdn.sqhk.co/busumodofu/FIhavjc/22918820700.pdf
    • http://tixesikixux.mygamesonline.org/64828524474.pdf
    • https://cdn-cms.f-static.net/uploads/4448995/normal_5fd5fbb56919e.pdf
    • https://cdn.sqhk.co/daluzowinasu/UeSsEsf/repairing_holes_in_plaster_walls.pdf
    • https://cdn.sqhk.co/guzorata/eOmdgir/bifasutu.pdf
    • https://static.s123-cdn-static.com/uploads/4480174/normal_5fd08fc368a1f.pdf
    • https://static.s123-cdn-static.com/uploads/4484993/normal_5fd0888c8268c.pdf
    • http://rokuboxajiga.medianewsonline.com/18035603861.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/wopari/zenosutetutemevo.pdf
    • https://s3.amazonaws.com/xotomisen/bupesogubosoro.pdf
    • http://jomopizemiz.onlinewebshop.net/zerodha_varsity_module_4.pdf
    • https://s3.amazonaws.com/jazamerijekufol/59651685460.pdf
    • https://s3.amazonaws.com/divelatoxa/remington_11-87_12_gauge_review.pdf
    • https://s3.amazonaws.com/dudurat/tsunami_hits_busan_full_movie.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8c9.bin
d8311204ab86d9e4bdc9d5358aabc871e7d958f5650db2c881cb1723f65ca24e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C9 4396 bytes
font_01_sfnt_off0000f7e2.bin
1f5b816e54df5aaf58cf124072c9a405a57cce199e13c6961e00281c90927139		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E2 12028 bytes
font_02_sfnt_off000120a1.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120A1 4324 bytes

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