Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c5060a8359a3a42…

MALICIOUS

PDF

86.1 KB Created: 2021-05-11 01:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3a8e7023db37e6a62bb7e86adbda639 SHA-1: 29ef9329a3e05af83db5e66798b9d53218a71ce0 SHA-256: 7c5060a8359a3a4235cc89df3cf70ad00da9566be2a74be4670009cc69baecd6
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 specific detection name indicating it's a phishing trojan. The document body, though partially garbled, contains text related to English grammar, which is likely a lure to disguise the malicious intent. An external URI pointing to 'kuzutuzo.ru' was extracted, suggesting a redirection to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/strik?utm_term=que+son+verbos+regulares+e+irregulares+en+ingles+ejemplos
    • https://static.s123-cdn-static.com/uploads/4474989/normal_5fcebf76904e3.pdf
    • http://legendnat.space/julidesakokusuz6w8j.pdf
    • https://cdn-cms.f-static.net/uploads/4379742/normal_6026c0f22554f.pdf
    • https://cdn-cms.f-static.net/uploads/4505096/normal_602c26b027f08.pdf
    • http://dokojekiferej.mygamesonline.org/jarasefogegisaxikotef.pdf
    • http://ig-copyrighthelpcenter.com/8_ball_pool_long_guideline_tooldd60s.pdf
    • http://boxberry-24.cc/47882332478r6pdy.pdf
    • http://7gusevshop.space/dobama95z8i.pdf
    • http://lnstagramlivesupportcenter.com/150683664287r0lt.pdf
    • http://rakapugijumub.sportsontheweb.net/1606159311.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jivamubug/kevufikoxawefavikedurul.pdf
    • https://s3.amazonaws.com/lukepepe/dokufejudagigonis.pdf
    • https://5b0ea1c3-b874-41d5-a3cc-49595beb80a6.filesusr.com/ugd/0c63be_8d600e4b769440ac912bf049983357b6.pdf?index=true
    • https://1bc2da55-d9f9-46f5-9d67-b48dc82c85d4.filesusr.com/ugd/957ce7_247b083eb95e4913bac1810ec4f5ae33.pdf?index=true
    • https://a804c8a8-fdf7-4fba-b19b-c23aecc29597.filesusr.com/ugd/a7074a_aa50642f4cb24674b070e17dd084a001.pdf?index=true
    • http://wetukanezin.atwebpages.com/kutabozoxevojefigofujava.pdf
    • http://wadoromutisagar.myartsonline.com/anorexie_du_nourrisson.pdf
    • https://s3.amazonaws.com/gifojuxaxeva/blackshot_m_apk_mod.pdf
    • https://s3.amazonaws.com/fosawef/gikesaluzeliwikamapoboge.pdf
    • https://s3.amazonaws.com/ginutu/xavubufik.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_off00010f6c.bin
5bec38f648e26bf0863b7fba5a361f9656d4ee2c63e5aef0cc703dc48f5a5425
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6C 5476 bytes
font_01_sfnt_off000121fd.bin
b016d1740684a104e10d5b0f62f337625dac475a47765b77c579edb5b5b42176
pdf-font-stream PDF embedded font (sfnt) at offset 0x121FD 11984 bytes