Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f0e81af05977569…

MALICIOUS

PDF

81.8 KB Created: 2020-12-15 21:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1c082c292aba0cb505898fda7744a2e5 SHA-1: 11821e8b32aa7d73f1e36bcb4dc4e4a1ac526ce9 SHA-256: 8f0e81af05977569bd475de9bb5b4402353bf782cb1c0bd05bf69f124d8feb98
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL points to a suspicious domain, likely serving as a lure. While no scripts were extracted, the PDF structure and the malicious URL strongly suggest an attempt to trick the user into visiting a harmful site.

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/wb?keyword=albert%20camus%20pdf%20el%20hombre%20rebelde In PDF document text
    • https://static.s123-cdn-static.com/uploads/4422377/normal_5fcd14e6a92dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391925/normal_5f965cdc3beff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420589/normal_5f9e2fcde3aec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461509/normal_5fa8a594529e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369903/normal_5f8953f7b5bbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501193/normal_5fbb41f543b53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388820/normal_5f9532ba22cc0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe3e32a97599144ec345f8/1606303284767/34871436963.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/candy_crush_soda_mod_apk_revdl.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/lexezi.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/bitdefender_antivirus_plus_2019_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10ac260f2895dc1e8a19d/t/5fc1491c08845d0924b9e20b/1606502685085/46162957264.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc155cc8139af037648468f/t/5fc8535ce21c7c679ae01103/1606964065153/wegex.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0fa6d5687f52b6b8190b1/t/5fd1d323a9eaf43bd855cb6d/1607586596360/77915239145.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/10_functions_of_language.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/71540781164.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_off0000fff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF2 5524 bytes
SHA-256: 911b7edf2dc4a86326a96a851189585bc9c31bbff7efd48e11e9610b9e7d0c53
font_01_sfnt_off0001128b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1128B 11584 bytes
SHA-256: 16502003bc159a3636d9abc594be1cdbbe9369a87af9720fe353615e3b5efaae

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