Malicious PDF — malware analysis report

Static analysis result for SHA-256 269b5aa16bf77c38…

MALICIOUS

PDF

76.2 KB Created: 2021-03-24 13:09:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39c6980fbc7b85d96116fe2bf9b23dcd SHA-1: 21e703b8b40bf0fc3f3254ee7c09d85a202c273a SHA-256: 269b5aa16bf77c38001c796deed37f1d17c3912d84abecca01571406fd81c933
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'lozipotod.ru', which is likely used to host a phishing page or download further malicious content. The document body, though heavily obfuscated, suggests a lure related to 'Android studio emulator sdcard path', aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/123?utm_term=android+studio+emulator+sdcard+path
    • https://cdn-cms.f-static.net/uploads/4409239/normal_60467afb4cfb0.pdf
    • https://static.s123-cdn-static.com/uploads/4387417/normal_5fcef8523b890.pdf
    • https://cdn-cms.f-static.net/uploads/4387033/normal_60484bce63144.pdf
    • https://cdn-cms.f-static.net/uploads/4445869/normal_603c1c1e9a054.pdf
    • https://cdn-cms.f-static.net/uploads/4457305/normal_601af43239874.pdf
    • https://cdn-cms.f-static.net/uploads/4449410/normal_6050342f932d5.pdf
    • https://cdn-cms.f-static.net/uploads/4388617/normal_602c04683d2c9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dogazisuze/sivudizonisebozepaxupo.pdf
    • https://s3.amazonaws.com/nosepevozux/41228592749.pdf
    • https://s3.amazonaws.com/semuxemakaw/dark_web_search_engine.pdf
    • http://bibirosomuxir.epizy.com/academic_ielts_vocabulary.pdf
    • http://pabovabavuwemet.rf.gd/latodur.pdf
    • https://s3.amazonaws.com/dipafuxe/sepebumirotebemig.pdf
    • http://vezimadokebavo.rf.gd/bexefodegaxo.pdf
    • https://s3.amazonaws.com/bezorito/bioflix_activity_protein_synthesis_rna_processing.pdf
    • https://s3.amazonaws.com/pobixedele/alerta_amber.pdf
    • https://s3.amazonaws.com/dikobepibelun/burger_king_taco_nutrition_information.pdf
    • https://s3.amazonaws.com/rujimidujek/listening_comprehension_test_with_answers.pdf
    • https://s3.amazonaws.com/sezebepit/16640786082.pdf
    • https://s3.amazonaws.com/zowejunef/price_of_zippo_lighter.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_off0000e93b.bin
f2f6274b3b62dd6341f449e1e927e02a089a7406285b93e902819c28ae12fafd
pdf-font-stream PDF embedded font (sfnt) at offset 0xE93B 5300 bytes
font_01_sfnt_off0000fb12.bin
90ec748e8ee2a0384b69ba1f9f0714f658d09d1349b3d4bce3b1c54167a9d9b8
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB12 12724 bytes