Malicious PDF — malware analysis report

Static analysis result for SHA-256 c713911f5e48e340…

MALICIOUS

PDF

65.5 KB Created: 2020-11-26 07:56:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e17a7b1214ca98d06cee2fc6f5b049c2 SHA-1: 3f5ccf924d72caf1866de99654060e43f418793e SHA-256: c713911f5e48e34068447b976b05a7e8d5f0825078b7ed1b5c29466c65faf60b
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file 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. The document body, though heavily obfuscated, appears to be a lure related to educational materials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffset.ru/strik?utm_term=bisectors+medians+and+altitudes+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368751/normal_5f89002e7846c.pdfIn PDF document text
    • https://visobugogo.weebly.com/uploads/1/3/4/5/134582963/25045.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_5fa8819734712.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368471/normal_5f8bc9cd31af0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380229/normal_5f9271ff71b45.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/4c322222-a395-47a1-9ad4-6b3c8e359e4d/57219750506.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5ea2a8f-4123-40e7-974f-7fef57b90ebb/48704172547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb07c58b-5838-44fa-a2e3-7706479dddaa/polafaganufij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9c5334c-2b0a-4483-8a87-3fa5042960e3/the_epic_of_gilgamesh_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c39621d7-868e-403c-9e28-0661caa6b54d/wopida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/824d424c-b681-49fc-82a0-ba1a2db15f2a/14366325487.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7F3 4692 bytes
SHA-256: d447dfe62f9733a772d76299ca299a9d25e9329ac142d184c4f234f152cf1cc6
font_01_sfnt_off0000b878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB878 5264 bytes
SHA-256: 30094054ed72ce618430fa30febaa5972ba8625f6e9b25d0bd55432ea4322cd6
font_02_sfnt_off0000ca32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA32 9708 bytes
SHA-256: a2b4aacf89c392b2ba21969b2176736130bdd2d13ca7e72ce8bb03f3a9671f90
font_03_sfnt_off0000eaa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA5 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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