Malicious PDF — malware analysis report

Static analysis result for SHA-256 89115450b2946b77…

MALICIOUS

PDF

71.6 KB Created: 2020-11-10 04:40:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 320f2932817d8f93a40cfeb97b8c391e SHA-1: 268be4ced9b4c594712825701f8f62bf0f2c99f1 SHA-256: 89115450b2946b77637ba892ab4f0de7aab2bc09a6a3c8ef083ac16d9aa111ba
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains an embedded URL that leads to a suspicious domain, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, appears to contain keywords related to educational content, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/strik?keyword=pltw+7.4+answer+conclusion+questions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417325/normal_5fa9cb981f18b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413126/normal_5fa4fda164ef7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383579/normal_5f9f769ba3ff1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485589/normal_5fa90ad2e91f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414502/normal_5f988ff0598c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422377/normal_5f989b56971e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5fa26b9975438.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/saziwijaxodav/maus_2_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a216519e-74b1-444d-9eba-582ea4e01ccd/triangle_area_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/vw_bug_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/lg_x_power_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/73728625297.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/descargar_curso_de_biomagnetismo_gratis_en.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_off0000da91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA91 5212 bytes
SHA-256: 77d388fdba8ccac47910c3e53ff77e26729112942f7ff59d2a2c52c6defb5094
font_01_sfnt_off0000ec7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7F 10860 bytes
SHA-256: 0c3b54ab5ccd583ff5bee7e8bba3ac1f04616a564bbcc9340b44804980d52897

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