Malicious PDF — malware analysis report

Static analysis result for SHA-256 866eb617b7acd49e…

MALICIOUS

PDF

78.3 KB Created: 2021-04-27 01:17:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1c5c00feaab911c9a4dbeb9b98197188 SHA-1: c326cddf330254884d7269cc68a6e17e38881afa SHA-256: 866eb617b7acd49e0f5f483ac964cfdc63183098068a18bcf513bd5cf901fc81
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, mezovuduw.ru, which is likely used to deliver a secondary payload or conduct phishing activities. The document body, though heavily obfuscated, contains references to 'positive words list' and 'wkhtmltopdf', suggesting a lure to disguise the malicious intent.

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://mezovuduw.ru/strik?utm_term=positive+words+list+from+a+to+z PDF link annotation
    • http://pivolirarorip.mypressonline.com/l_amant_en_francais.pdfIn PDF document text
    • http://zusagukitu.mywebcommunity.org/bose_cinemate_gs_series_ii_replacement_remote_control.pdfIn PDF document text
    • http://dashcamtopbest.com/how_much_does_a_2020_honda_rebel_500_costxgx4l.pdfIn PDF document text
    • http://idealicaitalia-ufficiale.site/saludos_y_despedidas_worksheet_answer_keyhwf7i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413244/normal_5fe6034e14252.pdfIn PDF document text
    • http://meetraisins.club/bopavamolapinawycbvh.pdfIn PDF document text
    • http://denazofumoxebo.iblogger.org/i_love_image_to.pdfIn PDF document text
    • http://cadenalia.com/what_happens_when_your_dryer_doesnt_dry9i46s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423155/normal_5ffe1743f21a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467576/normal_5ff972283a64d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pimimozoji.myartsonline.com/30061406317.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/66594744763.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/mejedakabotidano.pdfIn PDF document text
    • http://taxifegizuni.epizy.com/social_entrepreneurship_education.pdfIn PDF document text
    • http://wagiwejakizativ.rf.gd/prevencion_de_bullying_escolar.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/test_de_raven_para_nios_informe.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/patuzogurinibo.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/absence_request_form.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/27316668904.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/gukus.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f33b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33B 5256 bytes
SHA-256: 16ce4f934d8aa21cd8009644d032891ecf14a43aa18a2ed1bb507adc0a0c06d8
font_01_sfnt_off00010521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10521 11472 bytes
SHA-256: d6fb13ec824c2e8692a5e64bb68d674475e47cafcf931d9c3db3be940fe9996b

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