Malicious PDF — malware analysis report

Static analysis result for SHA-256 d12218b6e805a8e2…

MALICIOUS

PDF

79.2 KB Created: 2021-04-04 05:09:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 51de0537164c57da25dfddc2d720ceec SHA-1: 2a582e8e84225c920a8499747eaff9fadd9e942b SHA-256: d12218b6e805a8e228686b1cf673f64cc5c93e7799b2c2e51734b794d8ceaeb2
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 a suspicious domain, mezovuduw.ru, which is likely used to host a malicious payload or redirect to a phishing page. The document body, though heavily obfuscated, suggests a lure related to a formula or query, intended to trick the user into clicking the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/strik?utm_term=what+formula+does+wic+cover+in+pa+2018 PDF link annotation
    • https://cdn.sqhk.co/vugomupuzisa/gdvtPSI/vudolemozifuduweme.pdfIn PDF document text
    • https://cdn.sqhk.co/numisezopo/2Ugjsid/29987230969.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/igeiiMQ/vuwedovanizefojilal.pdfIn PDF document text
    • https://cdn.sqhk.co/zugivakizo/efogihh/dopabubo.pdfIn PDF document text
    • https://cdn.sqhk.co/wusoxopejezo/9XIjjha/umc_shona_hymns.pdfIn PDF document text
    • https://cdn.sqhk.co/zakolemafemo/ihgkbUP/jiwasidud.pdfIn PDF document text
    • https://cdn.sqhk.co/xifusajexom/hhJgfjg/freedom_of_information_act_letter_template.pdfIn PDF document text
    • https://cdn.sqhk.co/mekurapiw/enxgegi/granny_s_kitchen_galion_ohio.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/c7giheX/mit_phd_economics_admission_requirements.pdfIn PDF document text
    • https://cdn.sqhk.co/dakubakasilu/edjcAib/guess_the_song_quiz_2010s.pdfIn PDF document text
    • https://cdn.sqhk.co/degavorofala/giheUie/pukutuzevuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/78257fd4-3a6f-4f73-982f-a12713a59ac0/wilatadaxu.pdfIn PDF document text
    • http://worabomel.epizy.com/nut_bolt_weight_chart_in_kg.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/bruno_mars_marry_you_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/62915936087.pdfIn PDF document text
    • http://xenelerowem.rf.gd/roxodigileka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d902648-2b61-4a73-a34b-45ad5e10787c/rimidawenigezaxamola.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_off0000f34b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34B 6080 bytes
SHA-256: 9c3cbc1bc52fef302c81599c245b3e6d51dc4d6c82cfbaf8bff2581506f81a20
font_01_sfnt_off000107fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FA 11124 bytes
SHA-256: 0daf9ff58ff2e001408b1ea53a93e867c63ed6d8e462112e3685a153958cf5a3

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