Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a2090ed23017e8b…

MALICIOUS

PDF

76.5 KB Created: 2021-02-18 07:37:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b7d32ca88ede47f7154e78a2619c624 SHA-1: 9e95641eb78776c7ae5ced1f00f8efe5d265bf63 SHA-256: 2a2090ed23017e8b71fd887af38f7039e497cbdba5c461dcc7a7f9fd86dc963e
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 URI pointing to 'bologen.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a 'geo bee study guide pdf'. No scripts were extracted, but the presence of external URIs and the overall malicious classification indicate an attempt to trick the user into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=geo+bee+study+guide+pdf
    • https://cdn-cms.f-static.net/uploads/4369514/normal_6023aab0721b7.pdf
    • https://cdn.sqhk.co/jabuvilir/figVjcO/gibewizof.pdf
    • http://ramuwazezu.22web.org/excel_spreadsheet_for_tracking_monthly_bills.pdf
    • https://static.s123-cdn-static.com/uploads/4417321/normal_5fde68d0cf00b.pdf
    • https://cdn.sqhk.co/xawefigi/aiia4jj/89950045247.pdf
    • https://static.s123-cdn-static.com/uploads/4365576/normal_6007d3f55433e.pdf
    • https://cdn-cms.f-static.net/uploads/4392853/normal_6018b858bb7e2.pdf
    • https://cdn-cms.f-static.net/uploads/4380084/normal_6022a6a5d155d.pdf
    • https://cdn.sqhk.co/pafevola/iCegdgk/tiruferogezejurokas.pdf
    • https://cdn.sqhk.co/sokodajep/ibsx6o1/boom_beach_hack_2020_download.pdf
    • https://static.s123-cdn-static.com/uploads/4417429/normal_5fe0ffcd3e9c3.pdf
    • http://pemojubeku.iblogger.org/45260216850.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wepaxilex.epizy.com/javututu.pdf
    • http://gogozibopuxut.epizy.com/vilibeverupewewuredi.pdf
    • http://sobumewupuvuve.epizy.com/berkshire_ma_weather_report.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f08f.bin
555a80ef3c8241c986780a8ab52af09321cf759af8a8f6f8bf88454ab076e33b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF08F 5144 bytes
font_01_sfnt_off00010231.bin
35beca037b4dd28545ac5a5f820ed07228c1d184673482b69acd35a3fa95f1d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10231 10240 bytes

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