Malicious PDF — malware analysis report

Static analysis result for SHA-256 059b5ccdf77401d6…

MALICIOUS

PDF

73.7 KB Created: 2020-12-31 11:59:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ee65b7e8085cb64498684c531beece48 SHA-1: ed0720a205a7a6b8627a894cbf0a4bbbfd12cb46 SHA-256: 059b5ccdf77401d611385910b82bee212d1543039dacec838b0aaa8ba94d3f88
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?utm_term=the+big+sleep+analysis+pdf'. This indicates an attempt to lure the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for this assessment.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/123?utm_term=the+big+sleep+analysis+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4410678/normal_5fddbb27dc469.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375210/normal_5f8f30d848e0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f870e8cf1182.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447878/normal_5fe424ee3a354.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422890/normal_5f97835aef92e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394068/normal_5f996fd80fb2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414161/normal_5fb56be5e9a78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495974/normal_5fe419398b142.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474191/normal_5fd046591dc6d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365998/normal_5fc6229ad8278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372681/normal_5fa0de5058d0d.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/ac630925-064b-47db-97fc-5befa312acb8/9994984580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e932738-e2d2-4e7d-8457-9df26f1244a8/rainbow_stacker_classic_toy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eab69f14-3f6c-474c-808e-7aead197abe9/sujipora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee9f9c7a-f96f-4e93-883c-638b620ee342/vejiberotipudelavoruwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/438328e0-b2cf-4b40-9523-fcfd1073eeb2/12767249486.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d89f758-37db-46c8-b83e-1a253af236a3/jomunawigilepojir.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_off0000e4b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B1 5400 bytes
SHA-256: 58f9e74879be9a788d66766745eb9c0f827bb1db6a45062db255c7bdaa9f77ae
font_01_sfnt_off0000f715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF715 10236 bytes
SHA-256: 7f92cd2aa1dcc1514990fa8d5aca70e33c91558c47f1ae1920cb55f7ecc23d28

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