Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e04513499cada50…

MALICIOUS

PDF

75.7 KB Created: 2020-11-26 13:57:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4c48cd95d3a34fe29be2f2c583c622c0 SHA-1: 97d690236c9bf9a49f8150a2afde9ed1be005d63 SHA-256: 9e04513499cada50961b963e76343c02a0ace45aa86b3e12ce139fad9715aebb
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 0.9921

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://cctraff.ru/strik?utm_term=types+of+opals In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379241/normal_5f8b130913458.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487902/normal_5fbf468443300.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384640/normal_5fa527ea17565.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5fa56ef7f2e0f.pdfIn PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/9183548.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420470/normal_5f9ec6e9c58e3.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/91dcfd71-964c-486e-9d4d-0c7f6a51e7a5/76593635633.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10f88773-8cbd-4236-96bc-7f9efcd583e9/93871484992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca4c5a41-c1cb-481e-b1b6-fdcfeed323ca/4714256074.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA4A 4404 bytes
SHA-256: 284479e8c62b6d77f772955c1080ba68e9aa49cad597b6d07d3ef8303e4644f9
font_01_sfnt_off0000d959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD959 11444 bytes
SHA-256: 79f5236492a884fc4bb5de7177e056cb50a5361e22b8e84bc3c22edf447673f6
font_02_sfnt_off0000ff39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF39 16168 bytes
SHA-256: 2a71f1679477aab549e0c9adfb81c759c4f4858f5904a22c225b1c5f647777a9
font_03_sfnt_off0001144f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1144F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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