Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6306e46bd268e29…

MALICIOUS

PDF

74.3 KB Created: 2021-02-17 05:58:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 75653fe1bf68def59980c6b66866b52b SHA-1: 3c1ecbb6aa956fd7bfd75bf941bc22c3e4f6c89d SHA-256: e6306e46bd268e29398920ef15cb7cbd27e62632761b2ed7867489be87ffa4d9
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 presence of embedded URLs, specifically 'https://seumenha.ru/strik?utm_term=bash+script+for+loop+two+arrays', suggests the document is designed to redirect users to a potentially harmful site. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf', which can be used to generate PDFs, and the overall structure points towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=bash+script+for+loop+two+arrays PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450507/normal_60201c3eae9f9.pdfIn PDF document text
    • http://particulier-societegenerale.xyz/employment_contract_template_ontariommyss.pdfIn PDF document text
    • http://bewugexujiz.iblogger.org/61269228123.pdfIn PDF document text
    • http://benovezim.22web.org/savebizikepexezikofur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374021/normal_60240d77b3707.pdfIn PDF document text
    • http://gutafagiwoja.iblogger.org/30785514517.pdfIn PDF document text
    • http://registrat.space/13520029970ixfvf.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.site/454_namahana_st_4017cp3u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417318/normal_5fccee88d565d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gazivemon/juwiwamudogesebemesorumo.pdfIn PDF document text
    • http://rowebilit.epizy.com/brightwell_navigator_app.pdfIn PDF document text
    • http://sevetise.rf.gd/balao_da_informatica_em_sao_carlos.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/zesataga.pdfIn PDF document text
    • http://lonodaletitofa.rf.gd/a_million_dreams_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/dumuratev.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/71225743746.pdfIn PDF document text
    • http://nudenagazosizav.epizy.com/bexufutakodikavikaratel.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/armamp_music_player_apk.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_off0000e165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE165 5348 bytes
SHA-256: 667997ab06d710eee655a7ec9addbc51deae7ce5247d539de50ef1b2f0426f18
font_01_sfnt_off0000f3ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AB 11864 bytes
SHA-256: 1ab1f9f986e4cb6103c9edd14306b72d2071388fe79a55ac72d85c064c84573a

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