Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed17c33db2f66c7…

MALICIOUS

PDF

74.3 KB Created: 2020-11-20 06:43:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2231124f72dc44fa1693e3d01974112c SHA-1: e7f49e80b6cc076f1796c3ae15674ad1af547d64 SHA-256: 9ed17c33db2f66c71abe0286410ef4e14a1dc449ea8ecc1382a6a88550891e61
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, indicating a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious infrastructure, likely for further exploitation.

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://traffmen.ru/123?utm_term=10+key+calculator+functions In PDF document text
    • https://vadurevagide.weebly.com/uploads/1/3/3/9/133999829/paxegixe.pdfIn PDF document text
    • https://fiwerabonu.weebly.com/uploads/1/3/4/3/134347662/e69e026a8f.pdfIn PDF document text
    • https://naxesitigas.weebly.com/uploads/1/3/0/7/130740165/4419558.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/9298fbba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491164/normal_5fb4a9df46120.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://uploads.strikinglycdn.com/files/a46e659d-5e5e-4e00-a846-7b682aae57e2/r_r_auto_sales_nj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1fab38a-c926-451b-a52e-1fc91a22e08e/dobulakolop.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/58582466363.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39deb7bc-725a-4cbe-96f5-51e74b517930/26522921070.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2db686d-1d7a-4643-a7d5-0f6c0d397775/97947282264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/186ceda0-a8fb-44f4-aab7-ac9ebcf466ca/gemafivofefelib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25f2aacf-ac40-42ca-ad54-b3f9497fcb2d/kadiviratonus.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_off0000d964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD964 5024 bytes
SHA-256: 96e6ce266082a817fb2c864a6b078f94b9cf74b7e18ed074b049cad155e6594f
font_01_sfnt_off0000ea8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8C 10384 bytes
SHA-256: 40f6c4b77b14bf07b2b78f5084252ba022405b8a025044883cb25c7e57cbe8e8
font_02_sfnt_off00010e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E10 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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