Malicious PDF — malware analysis report

Static analysis result for SHA-256 051e67c59da50629…

MALICIOUS

PDF

82.6 KB Created: 2021-03-20 20:30:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efd0f67a95fb31e46b025215b0c7f153 SHA-1: cde9e898e785666902c61fe2766d4cc9f9aef9ba SHA-256: 051e67c59da50629c3e23ac03d41a901f72c06c8082446f4bb5620e9361e466c
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL, https://kuzutuzo.ru/aws?utm_term=citizen+book+claudia+rankine+summary, which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a book summary.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://kuzutuzo.ru/aws?utm_term=citizen+book+claudia+rankine+summary
    • http://pakirekugep.scienceontheweb.net/gilitubuxala.pdf
    • https://cdn.sqhk.co/gowozepugax/B3ijkVd/nobujubalogezaz.pdf
    • https://cdn.sqhk.co/rufigukuj/xji0hiR/40542088439.pdf
    • http://jepegupunu.mygamesonline.org/muxurujurib.pdf
    • http://gajonedorebuko.mywebcommunity.org/nujaludipawu.pdf
    • https://cdn.sqhk.co/levuzivanu/aBiciju/suferulupirev.pdf
    • http://gufurebu.medianewsonline.com/91466022763.pdf
    • https://cdn.sqhk.co/nejibija/BhjiBpn/kokugi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://monopevo.epizy.com/how_to_pay_dividends_to_directors.pdf
    • https://uploads.strikinglycdn.com/files/0fc39152-4e58-4de9-8845-2a6df8994feb/60835226861.pdf
    • http://vitipazapabixu.epizy.com/boney_m_songs_free_320kbps.pdf
    • http://rimalapotozuf.epizy.com/consonant_blends_assessment_sheet.pdf
    • https://uploads.strikinglycdn.com/files/96f0eea4-50d4-4c96-8d38-a9a28f3f1dfa/5995441904.pdf
    • https://f730d15c-1921-46d2-b6d4-288333e40990.filesusr.com/ugd/e2c223_3f538e67f7e448e3a6ae1c022cc13caa.pdf?index=true
    • http://zojabavikejowi.rf.gd/44100123519.pdf
    • http://pufawalaxovosi.epizy.com/colchester_sixth_form_college_map.pdf
    • https://cf2e1f24-e5f1-4289-9567-3affce9c164e.filesusr.com/ugd/a4ea6c_2d72f7f67e774a9faac22c0694e33254.pdf?index=true
    • http://sexesivakolek.rf.gd/wadafupoburadere.pdf
    • https://uploads.strikinglycdn.com/files/1e1543f5-ceb7-497c-89d4-1f3dd7b6217b/93829165058.pdf
    • http://mebuwakubir.rf.gd/aleph_borges_english.pdf
    • https://uploads.strikinglycdn.com/files/e3d8f094-a038-4b0a-b991-62aefebd23ac/wovuporitezizemige.pdf
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_da54f6c145e849ffa65f96d3f6dd34dd.pdf?index=true
    • 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_off0000f72d.bin
a8b5cabff5d0ffd954a797033c9289964daec266483660e21ef81291f0dbb5a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF72D 5348 bytes
font_01_sfnt_off0001094b.bin
d675221dc317df0bae3dc68889fffbece86be380a8c7e8c831a3e18249e9191a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1094B 10868 bytes
font_02_sfnt_off00012e5a.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E5A 4324 bytes

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