Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ef2f52c6d893bfe…

MALICIOUS

PDF

69.7 KB Created: 2020-12-07 06:44:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 53c0d23769ce79e773dbf2306e68445c SHA-1: d3e9f9ec71025594a6f7023c583ae92e085b924d SHA-256: 7ef2f52c6d893bfe629c4bb8f5a0e7a6269e6d8c645bd8c8389a79c05113e316
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ggtraff.ru/strik?utm_term=american+quarter+horse+legends In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383925/normal_5fb7a29a8cae6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f9f7a6917137.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f9c00db83d3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475875/normal_5fb3e9228377f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484814/normal_5fc24bb0ece2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405430/normal_5fad208d1940e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418192/normal_5fae47e2241ee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/851e1acb-ea34-44bc-8fc2-6b5dc12eb37f/solucionario_matematicas_aplicadas_a_las_ciencias_sociales_1_bachillerato_santillana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/160d9fe1-d6a6-4aeb-8e0d-0a892f12851a/russell_county_health_department.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc64fea085bf90c0e22058c/t/5fca6615c73aa43e658625c8/1607099926246/15484290857.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd182b803f460880cc9b37/1606228011843/61659626494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fae967da-7ae5-40dd-b36a-e96f0fd18afe/sonic_4_episode_3_apk.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_off0000c552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC552 5348 bytes
SHA-256: 43f131cb3d2923b15fe94056cd10160f6ea012e96ad823bc8c83b7a26fe92daa
font_01_sfnt_off0000d739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD739 10304 bytes
SHA-256: a44cf9c2d0441af663ebdb96513d38052198575bd934fc9647b614053589c68e
font_02_sfnt_off0000fa6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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