Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e44898fbc23f217…

MALICIOUS

PDF

74.8 KB Created: 2021-02-26 11:02:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 611573774c9db1304d52e2e8012b8a5a SHA-1: 25fe1b69bcb364ee30535d4984b5a6ad50e3868f SHA-256: 6e44898fbc23f21732550c382f759111ddd5f626dea0d5449b8789c150f2bf46
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains an embedded URL pointing to 'mezovuduw.ru', presented as a reward for a 'cloud security alliance survey', which is a common lure for phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites.

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/award?keyword=cloud+security+alliance+survey PDF link annotation
    • http://mujoxoluvisukid.getenjoyment.net/how_to_eat_fried_worms_online_book.pdfIn PDF document text
    • https://cdn.sqhk.co/vujaderaz/hewoowB/death_road_to_canada_online_multiplayer_mod.pdfIn PDF document text
    • http://digosige.mywebcommunity.org/munatunetejipoxared.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/sherlock_holmes_books.pdfIn PDF document text
    • http://suzofovolavuk.scienceontheweb.net/10548712636.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/finanzas_personales_para_dummies_descargar.pdfIn PDF document text
    • https://cdn.sqhk.co/palezubifo/mjeZhgk/dejub.pdfIn PDF document text
    • http://gilumesu.mypressonline.com/52665365141.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://newewixojarulup.epizy.com/kakaxiteriretolovofixedag.pdfIn PDF document text
    • http://wazinupizut.epizy.com/85527539653.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/first_100_digits_of_pi_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/maraperododoviwisemaz.pdfIn PDF document text
    • http://jilovin.epizy.com/nestle_lanka_annual_report_2018.pdfIn PDF document text
    • http://pejatopofir.rf.gd/online_chinese_visa_application_form_kenya.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/sawukobudurolaxazuf.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/jibagutujaruzagi.pdfIn PDF document text
    • http://petifogowiga.epizy.com/papopomozujawemup.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_off0000e89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89C 5000 bytes
SHA-256: 5a2aa5e06f6c56c49c537367f93c430f02f5ac4373ba6fcd1c4715049f19fe78
font_01_sfnt_off0000f9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B1 10688 bytes
SHA-256: 39ef879c4b8b37c6152403ca8f76700e2f8dab94d7dfc6c7306ee116163c1404

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