Malicious PDF — malware analysis report

Static analysis result for SHA-256 d24d75a4bbf69f4b…

MALICIOUS

PDF

68.0 KB Created: 2021-02-20 07:22:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 0531485ed928d7abb5986f1e2644177c SHA-1: 9d3bd2057e864d327e7e68369eb024972f9695a8 SHA-256: d24d75a4bbf69f4b4ede8ccac774b450b41abe03a57d85a99b0a27c8835e555f
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'baarspo.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to interior design courses, suggesting a lure to entice users to click the malicious link.

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://baarspo.ru/123?utm_term=interior+design+courses+south+africa PDF link annotation
    • https://cdn.sqhk.co/disegivoji/nwggnih/download_game_modern_combat_4_zero_hour_apkpure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379035/normal_5fd19b706a90f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369901/normal_6014060fc09fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371003/normal_60102f8e92a52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470967/normal_602f8030454b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421062/normal_5fdd94269abd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383165/normal_6014744173ca0.pdfIn PDF document text
    • https://cdn.sqhk.co/kebokeregim/jCieghA/doon_defence_academy_dehradun_fee_structure.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/gfgjihe/43013927822.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391317/normal_60136dc26717b.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/4c7TjjY/liwisi.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/jimugivos/nozosavelatum.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/benghazi_report_redacted.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/mainsheet_fine_tune_systems.pdfIn PDF document text
    • http://mewozukejos.rf.gd/kerbal_space_program_guide_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/navient_school_deferment_form.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_off0000ce5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE5C 5188 bytes
SHA-256: 1df33a45aa3112f14818fcba8ec06024c3878203ffa86cfead90e74b013821a6
font_01_sfnt_off0000dffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFE 10244 bytes
SHA-256: 66d07d9c4e8846d17e4b2c54827fb2d58577e4ae3981b3e4b2d0b20373c10c4e

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