Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eb4caa8b13aca38…

MALICIOUS

PDF

90.8 KB Created: 2021-03-21 05:28:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b3a7a882c31b8a74e79a1a714d61d35 SHA-1: 5623f00c8e8f1b172bc3908b2108740ddf305f1c SHA-256: 4eb4caa8b13aca38faa5abd4cd4297930a0305894cc6aa21127f861015abb135
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or malware delivery. The document body, though heavily obfuscated, appears to be a lure related to educational worksheets, suggesting a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/wix?keyword=solving+inequalities+by+multiplying+or+dividing+worksheet+pdf
    • http://dk-inc.xyz/integrated_chinese_4th_edition_volume_1_character_workbook9efis.pdf
    • http://fuwijumazawad.mywebcommunity.org/how_to_operate_black_diamond_storm_headlamp.pdf
    • http://kozijadeji.22web.org/vigorufag.pdf
    • http://mamontov-net.cc/17661361327wrybs.pdf
    • http://my-favshopd.online/mijagujel2xyy.pdf
    • http://kuroramogesok.iblogger.org/39205817625.pdf
    • http://nashremont.site/enchanting_guide_classic_1-_300zmtma.pdf
    • http://wutopezogegusi.getenjoyment.net/motorola_cp200d_battery_removal.pdf
    • http://rollernefrit.xyz/community_definition_sociologywagx0.pdf
    • http://nafepuzemobir.sportsontheweb.net/mewinegewudalexuzosu.pdf
    • http://vuvefezod.iblogger.org/gefimovanimuwuzapabakipa.pdf
    • http://zosoxefu.22web.org/xopobewo.pdf
    • http://nickned.me/253396879976spys.pdf
    • http://iranianvc.com/24480515175pkw17.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6518da40-f63b-46f6-9fbd-3a02e35e082a/philips_multigroom_series_5000_user_manual.pdf
    • https://uploads.strikinglycdn.com/files/a253a090-22e3-402c-87bd-15be7d07f795/nojuvadudepigupuvajob.pdf
    • https://uploads.strikinglycdn.com/files/3228cd15-8862-49b4-8f0b-cda503fb6ce0/78989138015.pdf
    • https://s3.amazonaws.com/rikolesafuwofar/66008844932.pdf
    • http://lozadubevapoke.epizy.com/salepalavonosek.pdf
    • https://uploads.strikinglycdn.com/files/d8d3e0e8-f11f-4915-a3ac-b2af976cc7cc/luzinaredifibavamivowiwi.pdf
    • https://s3.amazonaws.com/dudurat/febiveripulenadaxuje.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_off00010284.bin
162c0a010de815b7113e95042773df5ff206858396d732a2cab15c40ed542f26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10284 1644 bytes
font_01_sfnt_off00010aa8.bin
2147af96b2b0e5e1577a738b63722784c5e02a30e5aa12ff6a86b35f64a10689		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA8 6144 bytes
font_02_sfnt_off00011f77.bin
0a498b879db6ae6fd90f3b5a038f849842219444ccfed1c7e98e38859ff73dff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F77 11388 bytes
font_03_sfnt_off00014631.bin
79844014a869509069181dbbe727b78694704784ec363f31e8d6fed1a7e6d460		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14631 16368 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.