Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c26b5eea9ba519d…

MALICIOUS

PDF

66.9 KB Created: 2020-12-27 00:12:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 203d27228bb03b682a0c5fc14e9427a9 SHA-1: 951a37c24d81024af98203fc508a9dc8bff21a5a SHA-256: 0c26b5eea9ba519d4860d8287532b19064943591e11a0cc686f2ce024bc2db05
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing attempt. The embedded URL points to a site offering a 'brick breaker game' download, which is a common lure for users to visit malicious sites. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it may contain embedded JavaScript or other mechanisms to redirect users to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/strik?utm_term=brick+breaker+game+blackberry+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f98c12204d15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392647/normal_5f8f2b90f0edb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420239/normal_5fcd68364e6bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528959/normal_5fd615ca9711f.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://s3.amazonaws.com/sajatesawodiji/registration_page_template_bootstrap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ce6cecd-1580-487b-84fa-09536ca771d9/butarisipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ee8f3e8-5a92-4a5e-800a-aa992e8c2017/russell_westbrook_high_school_story.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/5686204196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0015fa0-1db6-49b3-8b9f-64e0c3cd4d11/final_fantasy_5_advance_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/babur_gaan_album_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00dca529-63fa-4842-8e7b-8dae0f146e85/sezigeremoworunerotixodul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1130aed4-27e3-4d68-b005-2e73d32d575e/18109739133.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_off0000bb6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB6E 5316 bytes
SHA-256: 4992e9c6ed4ddedd050b3fbbb5b89645956377d835ee522f14b2dc752a4e81af
font_01_sfnt_off0000cd7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7C 10284 bytes
SHA-256: 314ef506729587e5cf8b67d9fc2d61a444ad08fd04feaeb2b3fdce16f5a362d3
font_02_sfnt_off0000f054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF054 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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