Malicious PDF — malware analysis report

Static analysis result for SHA-256 b64cf3ffa27f1995…

MALICIOUS

PDF

81.8 KB Created: 2021-04-07 07:26:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d402c4efd1cc3628111e74be57ee2ce6 SHA-1: 1d753030b9b77d6483e6f8fe0f527842e5f464d9 SHA-256: b64cf3ffa27f1995a0385ec37c98b7024d521bc751a93a169faf0686354b6a43
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is also referenced in the document body as "base bros unblocked games". This suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/wix?keyword=base+bros+unblocked+games
    • https://gatuxarujesij.weebly.com/uploads/1/3/5/2/135296766/bimafazefozaxarim.pdf
    • http://kozijadeji.22web.org/scarborough_fair_celia_pavey.pdf
    • http://roxaresasupuke.iblogger.org/autocad_viewer_software_free.pdf
    • https://zewalomoweso.weebly.com/uploads/1/3/4/5/134588134/4747659.pdf
    • https://nazesamujev.weebly.com/uploads/1/3/1/3/131397942/2057846.pdf
    • https://fapufeloku.weebly.com/uploads/1/3/1/0/131071019/209728.pdf
    • http://puwofipafemuvif.22web.org/cheap_loyalty_card_templates.pdf
    • https://siridadujaxata.weebly.com/uploads/1/3/0/9/130969300/xumaror_lofetulem_kelud.pdf
    • http://bilabugova.iblogger.org/pisapazasunalikibamof.pdf
    • http://vinamituloj.22web.org/gafunijavofu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://mejovusemuvov.rf.gd/weather_report_for_chapel_hill_north_carolina.pdf
    • https://uploads.strikinglycdn.com/files/544386fa-39ca-4573-83ad-18436a589f98/pixovisekat.pdf
    • http://wigebinijeg.epizy.com/faloki.pdf
    • https://uploads.strikinglycdn.com/files/9c764577-67af-4d9e-a49f-b563b94c629c/sazedamuw.pdf
    • http://jimarol.myartsonline.com/rotizazunu.pdf
    • http://lodanije.epizy.com/tefin.pdf
    • http://zuruxiwowasigu.epizy.com/adolescent_age_range.pdf
    • http://joveteki.epizy.com/anemia_hemolitica_inmunomediada_en_perros.pdf
    • http://ludugatitabi.atwebpages.com/high_school_reading_worksheets.pdf
    • https://uploads.strikinglycdn.com/files/f4c20102-90bc-4c24-a0a0-805103eaa0b1/necromunda_underhive_wars_orlock_gang_build.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3e7.bin
20b76ddadf83204ab0a194d907e3be9a67b597e42aa8d1fc77dc5cfe6fd87741
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E7 5264 bytes
font_01_sfnt_off000105aa.bin
2560a3400074c10616a1c7da70fd624a7da49784681c8a61b02e83c7d2aa9dbd
pdf-font-stream PDF embedded font (sfnt) at offset 0x105AA 11344 bytes
font_02_sfnt_off00012bea.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BEA 4324 bytes