Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4e8a1a045740f3f…

MALICIOUS

PDF

60.6 KB Created: 2020-12-24 12:56:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: fffccc96aceacad862d46f6b9d43017f SHA-1: 2163312b4c0e9d647033a68fed486bbf51680f6b SHA-256: c4e8a1a045740f3fe05247b3733ec28d9dd5cb084dc44ff87f5ff5e15b92fc2c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged the PDF with high confidence. While the document body is heavily obfuscated, the presence of a malicious URL suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gettraff.ru/aws?utm_term=puma+track+jacket+size+guide In PDF document text
    • https://cdn.sqhk.co/supuzeren/BIuIicE/get_list_of_sheets_in_excel.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/fa1691fe-a0ad-4084-999b-32afcac35112/sonuxonileses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07536d37-09fa-4c95-aac4-ddd04a0199fe/89756095619.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9800be83-be25-4eb0-b9a5-ea097c6965aa/98435773601.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b1a1d17-7717-42a1-bf94-289192770ddd/37809304792.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a305b6aa-430e-4659-a600-2ba9d632c7d2/romepozojiwovedolajidufan.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/putoditunibimev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7761e7f7-56c6-45f1-8181-4035c3db3a29/47235057684.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92d180b7-9142-4ef3-b740-20c2cef88dae/damenafitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55f6df6a-47c2-44ea-b54b-3549b1bf4f34/kasujuwurowog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/411d96da-0621-497d-b276-10d4130703f8/bowefaduzitolenotok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0ee8ba7-f2e5-4f0a-8a00-a1c921922bc9/chowder_mung_daal.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_off0000ace3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACE3 5420 bytes
SHA-256: e87512c0d1f4bff86805013a07fc472dc1fbb853974abaf56348f7d119e0b8e4
font_01_sfnt_off0000bf47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF47 11392 bytes
SHA-256: d96fcce2232fb6fe88c50dc372fa9f406db37e8c0d230dec00bdc1cf6feb7c9b

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