Malicious PDF — malware analysis report

Static analysis result for SHA-256 4596ed1674dc5c65…

MALICIOUS

PDF

81.1 KB Created: 2021-03-21 11:00:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13be99c6301dd167d8082c0b8f575c19 SHA-1: 780b8d8f4fa757d5d11472c2d2f87fc4b50beb69 SHA-256: 4596ed1674dc5c6526fc1157409d41fcc9e5bdc6cde40f7f2fe2863e82efe814
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with the ClamAV detection name 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0'. It contains an embedded URI pointing to 'https://kuzutuzo.ru/wix?keyword=eagle+scout+workbook+word+document+2015', suggesting a phishing or social engineering attempt. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs are indicative of malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=eagle+scout+workbook+word+document+2015
    • https://cdn-cms.f-static.net/uploads/4374203/normal_6033001645582.pdf
    • https://static.s123-cdn-static.com/uploads/4426572/normal_600350067a166.pdf
    • https://static.s123-cdn-static.com/uploads/4370071/normal_5fce8065caa3e.pdf
    • http://buliwomof.22web.org/general_information_sheet_deadline.pdf
    • https://static.s123-cdn-static.com/uploads/4469634/normal_5fcf608033414.pdf
    • https://cdn-cms.f-static.net/uploads/4404514/normal_6014c42fa81b3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/29148eba-75b7-4306-9a2f-a3fb8622c42e/sawojinorenalugi.pdf
    • https://uploads.strikinglycdn.com/files/5ae6b7be-c0d6-4451-9c31-082e0bf5b53a/rosokofutizevugep.pdf
    • https://s3.amazonaws.com/dojivewobasuval/87261214986.pdf
    • https://uploads.strikinglycdn.com/files/356153d7-6c20-4600-82be-e4bb0b2e9326/sisusikuxodalijajet.pdf
    • https://uploads.strikinglycdn.com/files/f36dcb02-6228-4ecd-b67c-dde0cc65258d/52465139619.pdf
    • https://s3.amazonaws.com/rekorewexidiwo/bodyweight_core_exercises.pdf
    • https://s3.amazonaws.com/zarelusipofox/zoom_in_animation_android.pdf
    • https://uploads.strikinglycdn.com/files/8e8101d8-4d1e-444f-833e-e5a4ab47c109/57336246512.pdf
    • https://uploads.strikinglycdn.com/files/1d72d646-d86f-4064-939c-cfe037ef131d/how_to_calculate_cash_dividends_per_share.pdf
    • http://weralawubuzeg.epizy.com/43304792961.pdf
    • https://uploads.strikinglycdn.com/files/874f38ed-2e4f-49f7-b668-925b592dc9c9/briggs_and_stratton_platinum_7.25_190cc_manual.pdf
    • http://powejuzusar.epizy.com/fevewusi.pdf
    • https://s3.amazonaws.com/rebomedug/25472967180.pdf
    • http://pavirej.rf.gd/formal_letter_for_job_interview.pdf
    • https://s3.amazonaws.com/buwosevax/penetrance_and_expressivity_answer.pdf
    • https://uploads.strikinglycdn.com/files/c38df91e-7248-417f-8c3a-736eff4d1b2c/best_womens_watch_brands_under_1000.pdf
    • http://reridinal.epizy.com/dog_mange_pictures_symptoms.pdf
    • https://uploads.strikinglycdn.com/files/1c1f21c4-c29b-4f4d-8fa6-b030400c7254/dovosilivipixa.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_off0000f53f.bin
b1d9d25d93fb6ba8f13d39961d23947427691d3365a39169180b4916b23a5ce1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF53F 5960 bytes
font_01_sfnt_off00010998.bin
7d4a5e62b7c15f64eeb33f774d380e18fa14e26880c68cbc86f2c4287855ba7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10998 14428 bytes

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