Malicious PDF — malware analysis report

Static analysis result for SHA-256 53cb846174a1fdb9…

MALICIOUS

PDF

82.1 KB Created: 2021-05-28 03:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d07d3fff13004d585a6c1db0170c3269 SHA-1: 1f7533c26511f8c398ad545a316568604295fd52 SHA-256: 53cb846174a1fdb94356a037ce7da28e5eee317d744d799d43e982f2350d73af
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://leonvi.ru/strik?utm_term=wasd+and+mouse+games+unblocked PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4469837/normal_6008c1343f29c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413118/normal_603104cc66aa2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416938/normal_5ffeb8624e690.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528780/normal_601569821eee4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383156/normal_5fceb4f452cfe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407813/normal_5fdf7ee8ba6a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499972/normal_60065abb3301a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407807/normal_602488079d681.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388163/normal_6031e1825e827.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382790/normal_5fe03e6e2f639.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448330/normal_600a50acb0e1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417653/normal_600d6ca0d61b4.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/47346958-84e3-4f64-90a8-d85b4cdc2f16/xedokezakaka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbc261bf-385f-4c20-af6c-8b39f6cd97d8/fozorizunitufirig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/725e6921-f2f8-4bff-8dcd-423ef2fac6ae/82197508358.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7681a489-b35c-476c-b46a-b6269c98912c/mobogozexodekuzis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca5e9130-33f6-4e7d-9332-a6650c5c31ce/shark_rotator_powered_lift-away_vacuum_with_duoclean__zero_m_nz801anz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13529713-622b-437f-b643-e13be604b8db/sanijipovukubob.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_off00010276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10276 5380 bytes
SHA-256: 81336af232d0520ef48da2a3b6081024ab51c84d75db72d91978c4e8c2f8b9f2
font_01_sfnt_off000114c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C1 11452 bytes
SHA-256: cf7bc38e954d854d2278ff7e57fec60905b1f87edbd4f0aa06b0954a55cee519

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