Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6ed4a24523efb20…

MALICIOUS

PDF

84.6 KB Created: 2021-03-09 06:23:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edbf6c4eebb1b704e2b39cb88925a878 SHA-1: dc034e66b19fa3423b3a3d643311a3ef610bc14d SHA-256: c6ed4a24523efb20c410ac1792e19eec345d8412c7ce87501940e5b090c05dd5
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. An external URI pointing to 'maypoin.ru' was extracted, suggesting the document's purpose is to redirect users to a potentially harmful site. The document body contains garbled text, but the presence of the URL and the heuristic firings strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/123?utm_term=don%2527+t+stop+believin+sheet+music+musescore
    • https://cdn-cms.f-static.net/uploads/4369501/normal_6012b26f746b5.pdf
    • https://static.s123-cdn-static.com/uploads/4469104/normal_5ff6591a6b950.pdf
    • https://cdn-cms.f-static.net/uploads/4391047/normal_5fd63c7074f3e.pdf
    • https://static.s123-cdn-static.com/uploads/4388427/normal_5fe53494c7dc2.pdf
    • https://cdn-cms.f-static.net/uploads/4475997/normal_5feaf04c74cc0.pdf
    • https://cdn-cms.f-static.net/uploads/4383703/normal_603419497a164.pdf
    • http://theharaka.online/jurnal_hernia_diafragmatikaj50vh.pdf
    • http://reactivaperu-2020.com/71897323996gwvru.pdf
    • http://bioforcecolumbia.site/vibukomalalerevipasedx6fu.pdf
    • http://usesoda.pro/bakezi1wxil.pdf
    • https://static.s123-cdn-static.com/uploads/4366337/normal_5fe348708f29f.pdf
    • http://rodsfish.club/zimuzaluorh4.pdf
    • http://mazubume.22web.org/19042957790.pdf
    • https://static.s123-cdn-static.com/uploads/4381101/normal_5ff4856d9b5aa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/loxopudizus/31874447127.pdf
    • https://s3.amazonaws.com/tajimipojimo/cavitron_plus_service_manual.pdf
    • http://jupejorix.epizy.com/dovezasanizolikil.pdf
    • https://s3.amazonaws.com/defujo/bootstrap_form_border_example.pdf
    • http://palopotezaval.epizy.com/garmin_s62_golf_watch_best_price.pdf
    • https://s3.amazonaws.com/gedexim/what_are_asymptotes_of_rational_functions.pdf
    • https://s3.amazonaws.com/tujeviwakirawu/grade_1_writing_worksheets_printable.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4de.bin
8bb07975a376424e551e708c3e62f8f9fcad219d84c5ebea6d05d6e2e3ac6f68		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DE 5076 bytes
font_01_sfnt_off0000f608.bin
5f8c6d9b3af50f2010b75c833ce75830e96b3163357ae133f798332ce86a1fea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF608 12956 bytes
font_02_sfnt_off00011f48.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F48 16204 bytes
font_03_sfnt_off00013475.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13475 4324 bytes

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