Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ecbaf9609275116…

MALICIOUS

PDF

66.5 KB Created: 2020-12-16 05:14:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 865c0967253149c8a41109b1e270f0c4 SHA-1: 9fe241eb7f192a7eec5f29e2768785a8e15ee037 SHA-256: 6ecbaf9609275116c430162bcdfd516f507fc65a194295ba60e3cd2b1787ae96
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 redirects to a suspicious domain, likely as part of a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to lead the user to a malicious site.

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://trafffe.ru/wb?keyword=counting%20atoms%20worksheet%20answers%20pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373782/normal_5f92c8830db35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446259/normal_5fa1ec303b3c1.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://static1.squarespace.com/static/5fc5c07f92c50b1a1e98aee2/t/5fd070a4fc93c51d16ded2df/1607495850191/vekisugujujisovit.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57fa39698b02c7f3fce92/t/5fcbc1a2bce7087d1ae57bf4/1607188898958/cake_maker_cooking_games_online.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/employee_attendance_management_system_project.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96bfd2ad-7f0c-40d2-8b48-d4c5b388fdd5/jeepers_creepers_1_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc118153dfdd95b60d632f0/t/5fc5862c08845d092447dc9f/1606780462540/the_making_of_a_poem_strand_and_boland.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6c827d32fb7060d0d779b/t/5fd0018c01d3ff2a53972919/1607467405522/52166790311.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd005a8cb11b25c09c6d0f/1606221915072/s-290_student_workbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c104426-33f8-4bb3-9071-eb783bbda4ab/conan_exiles_greater_crocodile_pet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58f3f2bbd740658262c34/t/5fc9ca674e3f3d25173c6920/1607060071568/high_heel_shoe_birthday_cake_images.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/93159764184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/964b7a96-e7c1-40f0-8280-45133c3f3aa0/16504515752.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5c49217e72026400b6e23/t/5fc6144464571256540c60c4/1606816837560/87982636736.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/telugu_movies_sites_hd.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_off0000ba7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA7B 5484 bytes
SHA-256: b5c3b239444bf5e31d2abf1dd1a1bf1ba255c8b9984d5634a90f2b05b980b0b4
font_01_sfnt_off0000cd0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD0C 9932 bytes
SHA-256: 5285a289d1f04da4c0beb214d71f44776777b985c2da7dd91d0d37d47068c13b
font_02_sfnt_off0000eecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECF 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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