Malicious PDF — malware analysis report

Static analysis result for SHA-256 89d629d40f1ab6c4…

MALICIOUS

PDF

75.5 KB Created: 2021-03-10 05:42:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f06491ea11f7b7c00d60b75f1b354e4d SHA-1: a4f1ab76da961802b4c5d5b199faae0516499299 SHA-256: 89d629d40f1ab6c4891c02d6691aa261bf1e519c418dc1b06bb3a435e4a84a0a
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 ClamAV and an ML classifier. It contains an embedded URI pointing to 'dugedepap.ru', which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to 'codependency and addiction worksheets'. The presence of multiple unknown URLs further supports the malicious intent.

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://dugedepap.ru/123?utm_term=codependency+and+addiction+worksheets PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413865/normal_5fd98b35345e0.pdfIn PDF document text
    • http://online-sistem.site/champion_generator_3500_carburetorhbell.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481819/normal_600bd29cd33e4.pdfIn PDF document text
    • http://verezitabel.66ghz.com/89962812663.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383692/normal_5ff3a033b2783.pdfIn PDF document text
    • http://sebekeruxa.iblogger.org/marketing_ideas_for_insurance_agents.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462379/normal_602c63ab43838.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501383/normal_6003a9439d9f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380411/normal_60469e4a89866.pdfIn PDF document text
    • http://stroy-level.ru/components_of_expert_system_in_management_information_systemo7ve8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464521/normal_6005b02a7ef0a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sinadi/18805626878.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/jetuwerejobofeso.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/tengakhat_dibrugarh_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/jukariruvupezarilipora.pdfIn PDF document text
    • http://nujowizuwumug.rf.gd/sovopepez.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/crash_bandicoot_racing_game_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1b925f0-3d86-45d8-a096-dc211673e1ed/bunif.pdfIn PDF document text
    • http://xufojeji.epizy.com/designing_data_intensive_applications_download_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d56efb7-0b82-4a67-8ef2-f8b2333e72ff/game_theory_textbook.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB21 5292 bytes
SHA-256: 0928614073a512304b526debff946ea07c51e28704f114d8275952e4e5c1f8f4
font_01_sfnt_off0000fd2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2F 10444 bytes
SHA-256: 836ddc6babacfa1e54254b2a9f2d7ab061b6fdaccc8de0219001d579265a54f5

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