Malicious PDF — malware analysis report

Static analysis result for SHA-256 96d97fd1374f6fda…

MALICIOUS

PDF

72.1 KB Created: 2020-12-14 19:00:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b39259f51ef937998dd327a8dd9022cc SHA-1: 51c0634ca65fd186df3e768a8735b7c03eb13f6f SHA-256: 96d97fd1374f6fda3d39d77393145892620bb5f8cf21b288fe2965d10d244918
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links pointing to external resources, identified as a link farm. One of these links, 'https://ggtraff.ru/wb?keyword=kanoodle%20game%20answers', is flagged as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/wb?keyword=kanoodle%20game%20answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387410/normal_5fa335504b8c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391331/normal_5fd2d99f38f4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368958/normal_5f8d25b60ea7b.pdfIn PDF document text
    • https://milelujip.weebly.com/uploads/1/3/4/8/134861654/7382163.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409992/normal_5fbdc24e5e7d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371261/normal_5f9325be1ae2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448731/normal_5fc2aae570726.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388037/normal_5fc738f18484b.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/77a94e4c-b0a6-4607-a1c7-272c8a06ef61/tizevubojinavosiluzop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fa20662-d0b0-476f-856b-f0ea41af645d/psychology_an_introduction_11th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee2ae47e-8fb0-4dea-aa2f-7170caa46225/modern_blues_harmonica_artists.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57e545ae-154d-401e-af5f-7383f0c04d25/wibufomanononiwuro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ff83c96-b348-4de2-93f9-ee3a0441f846/wamekebososuluromezaxut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f44e8e8-8938-4d89-9e1d-e9d3ddc5ea7c/basic_of_biblical_hebrew_workbook_answer.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_off0000db3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3E 5208 bytes
SHA-256: 94391b1a771daa0e1351a2c18df74c2d4b721f54ba8fee68127c5a8c842191a8
font_01_sfnt_off0000ecf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF3 10964 bytes
SHA-256: 0d3743cda3c98103c4a3ffe2c0e41ecda32dafa296855ede8bff96b9fae29969

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