Malicious PDF — malware analysis report

Static analysis result for SHA-256 64493599bfdd0d75…

MALICIOUS

PDF

72.9 KB Created: 2020-12-15 11:54:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2d99400d39417ccd29af82bdd566c64b SHA-1: b2d1541945da26e7f33f4639fd32d3e27837afa3 SHA-256: 64493599bfdd0d752ca7fd5200bed3c19a4fb8670299648e9df697dcd3c1985a
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://ggtraff.ru/strik?utm_term=web+xem+phim+hong+kong+tvb'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious URL strongly suggests an attempt to lure the user to a harmful site, consistent with phishing or malware delivery via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/strik?utm_term=web+xem+phim+hong+kong+tvb In PDF document text
    • https://xepuxewezikute.weebly.com/uploads/1/3/4/4/134437058/1762b1537c6464.pdfIn PDF document text
    • https://domoposuselof.weebly.com/uploads/1/3/4/7/134720049/rokesijemape_lojegonewolasa_digipadulara.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420239/normal_5fa029831367b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zamuriza/rusega.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5de1b7848ba205d3add58/t/5fcbe72833fb14715cc9111d/1607198506119/powujabazoz.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/rowosujiguj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b24bbc16-3a0e-4674-b99b-e938d8df9052/32220298345.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc65ac32cf09257bd909f09/t/5fd1586e9a9e5443ac6b0a5d/1607555183918/84489233198.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/666c8e1a-70ed-43fe-9815-6189bd7e6dfe/goxedosukakikiwizaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91bc92ef-cedf-412a-bfa5-1e0958daf049/little_norton_reader_ebook.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/13258855037.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_off0000e0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AF 5064 bytes
SHA-256: 840284c56886b86f736f88306e1ae49a32799afc42d148935062bf1cb06c6957
font_01_sfnt_off0000f1dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DC 10988 bytes
SHA-256: 063f3d5007a82664af140e14ea56d38ddb940e65d2d2cb2236136b25915ee56e

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