Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd3027736c4099eb…

MALICIOUS

PDF

77.7 KB Created: 2021-04-01 09:17:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b31b023fd9cb617b2f664cc08458852 SHA-1: d8e2dedf0b7383448133ac3eb980069562350c93 SHA-256: bd3027736c4099eb6cbaac0c0464e1edc0b82892d9f74b6fb48a55b2e52fc5a3
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, indicating a high likelihood of threat. It contains an embedded URI pointing to a URL that appears to be a lure for software hacks, suggesting a phishing or social engineering attack. The document body, though heavily obfuscated, contains metadata related to its creation by wkhtmltopdf, which can be used to generate PDFs from web content, further supporting the idea that it was designed to mimic a web resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://kuzutuzo.ru/wix?keyword=neutrino+apk+hack+2020
    • http://muzomabavima.medianewsonline.com/2747935569.pdf
    • http://vugekowuzujed.scienceontheweb.net/honda_hrx217_lawn_mower_service_repair_manual.pdf
    • https://modofanapaf.weebly.com/uploads/1/3/4/6/134676621/rokijepokusuna-biveziwusafawu-bazenot-zakadov.pdf
    • https://static.s123-cdn-static.com/uploads/4367635/normal_5ff19811bf3f8.pdf
    • http://ledimpress.biz/176572064907xzj9.pdf
    • https://javekulu.weebly.com/uploads/1/3/1/8/131872149/4e7387a7cef8.pdf
    • http://fukiwurezopukof.mywebcommunity.org/nefefili.pdf
    • https://xugubevowasisof.weebly.com/uploads/1/3/4/8/134885616/c0a7e82f8e571c.pdf
    • http://copyright-helps-team.com/why_is_my_hp_officejet_6600_not_printingo0zd7.pdf
    • https://cdn-cms.f-static.net/uploads/4367304/normal_5fdbec836771a.pdf
    • http://wumewil.sportsontheweb.net/xaxokirozuvevorevoki.pdf
    • https://kegewibenufugix.weebly.com/uploads/1/3/2/6/132682471/kejedefogowa-vuvumejegi-nisizajab-movuzusatat.pdf
    • http://nipizakevenuvis.scienceontheweb.net/3rd_class_maths_textbook_telugu_medium.pdf
    • http://oneplusonemain.xyz/space_background_sound_freez3ume.pdf
    • https://tamipabofoj.weebly.com/uploads/1/3/4/8/134876193/vakuf.pdf
    • http://shoop-fe.ru/294643485907av3g.pdf
    • https://static.s123-cdn-static.com/uploads/4531523/normal_5ffded4d2effb.pdf
    • https://pobunusegem.weebly.com/uploads/1/3/4/4/134460984/3061871.pdf
    • https://static.s123-cdn-static.com/uploads/4417644/normal_5ffd54aa9c987.pdf
    • https://cdn-cms.f-static.net/uploads/4389603/normal_604cdcf3b1a38.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://masusoxowep.onlinewebshop.net/building_design_download.pdf
    • http://ligujizulogi.atwebpages.com/assembler_plusieurs_images_en_1.pdf
    • http://zodiripek.myartsonline.com/gradable_and_strong_adjectives_exercises.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_off0000f284.bin
e8972bff0bfa416e21de0d2de781365b0c00efa2a638a621343bcd21e808b73e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF284 5120 bytes
font_01_sfnt_off000103f1.bin
466b4ff1d47cb99625934a5d9087c7ae8f6836699e96d96039486e2e2bf03bec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103F1 10896 bytes

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