Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9775afe2c05acf2…

MALICIOUS

PDF

71.3 KB Created: 2020-12-21 16:57:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 459f6d21397723cfdc179d9ab70985e9 SHA-1: 26eb71f96940c8835095910cc654bc29108d2e0c SHA-256: c9775afe2c05acf28aa675307088f5adf57cf7ceb1372feaa05e2cd4036c490c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

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://traffine.ru/wb?keyword=final%20fantasy%20xvi%20wikia PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369663/normal_5fbe9503927f5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea0c18a8-7d55-4c73-84d7-9e01697708d3/97213517474.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/java_jre_7_u51.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/2787006744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63cdda3a-e231-45ae-ae21-2cf251536bc1/big_brother_19_americas_favorite_player.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/nemoza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a96ba98a-5c6d-418b-a623-fb77b52f51f4/mijiwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/304d1499-220f-4229-a04d-6b32834df58c/66866036013.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/nowimisuzo.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/duzob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb08ed9a-2b6f-48f1-b9b6-729f01212fe2/desos.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/char_broil_performance_grill_ratings.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/wind_erosion_control_measures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82b673af-7ced-407c-ad63-542207e0e68d/bowel_preparation_for_colonoscopy_guidelines.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFA 3236 bytes
SHA-256: 2a124a3dae52ebcfe3e512067ef7456d3c7a48325bdeb1bd572c638e7a69cb63
font_01_sfnt_off0000d8a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A6 5004 bytes
SHA-256: bddbce9f84c072554bc3a49db71dd64ee734138383df9ee966f78f971cd6ace5
font_02_sfnt_off0000e9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EA 11720 bytes
SHA-256: 5c7a701d63d01b584617cb0f9a5ad75591e3a5c7ed257feec9fb0f8d36917811

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