Malicious PDF — malware analysis report

Static analysis result for SHA-256 95cad324009021c7…

MALICIOUS

PDF

74.8 KB Created: 2020-11-11 20:09:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9d4e0467a6ef5408bda8ce5ea4b45691 SHA-1: c2ca39ab6c248c95cb0519583cfddec3997ecc39 SHA-256: 95cad324009021c7383ee2cf667b263eb69ba7447c5fb708f6bb02854af8a217
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing for a malicious redirector link. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content via numerous linked PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=3.5+best+metamagic+feats In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393348/normal_5f9a730002d05.pdfIn PDF document text
    • https://jaxobowes.weebly.com/uploads/1/3/4/5/134591409/963ee.pdfIn PDF document text
    • https://tomojuvugitem.weebly.com/uploads/1/3/4/4/134475437/3206681.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383147/normal_5f944313cf802.pdfIn PDF document text
    • https://lazetulomobepi.weebly.com/uploads/1/3/4/3/134326787/65f3a94198fcaa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371799/normal_5f897737b9c4e.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/vigukofuve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379602/normal_5fa92d3fa296d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373778/normal_5f8e68a3dbc83.pdfIn PDF document text
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/2152836.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369509/normal_5f94a0b17ae7a.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/ce642548-0c41-4a2f-9700-651d74e46ce7/65608540257.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72b3f5e2-e05a-4d14-9c41-5377ce6618f0/back_pain_body_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9be301b4-9d7e-4076-b218-bebbf4dba71f/cantique_de_simon_partition.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_off0000e8e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E2 5436 bytes
SHA-256: 3dc7722b789bf89a7d351a99b028c3a81810ff988670bf28e651e6d7d0ef6f64
font_01_sfnt_off0000fb63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB63 10388 bytes
SHA-256: 93225987da784886d3c19feff65368debddc680477772b7564e1d9b7f5dc4c42

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