Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d3ded3961dd051e…

MALICIOUS

PDF

81.6 KB Created: 2021-06-11 14:09:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2293f91cba88066af6c29792d1bc8bc0 SHA-1: ec508550a97d165ed8b816371799fc3217608312 SHA-256: 3d3ded3961dd051ecfe9270d517d8f95cde7f5dd55d6c63ff6b5b673f1839744
96 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 embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://synerhu.ru/pbw?utm_term=english+lesson+template PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408992/normal_5fef9f04f17af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366984/normal_605d121848f61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457272/normal_60c0233b3d3d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449604/normal_5fce9d85eb9ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421983/normal_6029586c337c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377933/normal_606266df58d4b.pdfIn PDF document text
    • https://dotolisode.weebly.com/uploads/1/3/4/6/134616401/magiguduzu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471513/normal_602104a4c7bde.pdfIn PDF document text
    • https://powirubojeti.weebly.com/uploads/1/3/1/4/131482959/a0d52ed0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454184/normal_6006078e7f311.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464861/normal_5fef7df789859.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495400/normal_5fe15017e495c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480145/normal_5fd057c18984a.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/fa21b2e3-4d8b-481a-9c7b-4d800f0e59ba/is_kerbal_space_program_worth_it_on_ps4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c770018-13d2-472b-bc09-0e199809b513/graphic_design_internship_salary_melbourne.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8dd1c7e-db76-4522-a99b-2b104b9d03e9/vewow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79929353-b366-4be9-b63c-785d2aab8031/4618094746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3233e767-7de4-4f8d-a111-af740e90c48c/xebuxezumijipeseg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b28f3fd2-9d32-474e-b2e1-5151e1403253/what_does_the_silver_chair_represent_in_narnia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ca1182a-bb3c-4ffc-9a79-0a238568b725/65156586822.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10231 5092 bytes
SHA-256: 726835ae8ff16693e0e21bac509a94cb86579cff676e725e42e8d09fa1c11c53
font_01_sfnt_off00011363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11363 10696 bytes
SHA-256: 653f36a66bf282d849062c38fa03fe4bd3d49301066f512f57d1372811c96f62

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