Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d0dbda17e8c2159…

MALICIOUS

PDF

67.0 KB Created: 2020-12-19 03:54:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5f72ff0f7996e41139d429b985d19af1 SHA-1: e2c940aea8b1f0b99e28e65ad62e88a471305dca SHA-256: 8d0dbda17e8c2159291e6882f21f1d430de90e3399fec03c0f0288e541b7ace5
214 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics. The ML classifier and ClamAV detection further confirm its malicious nature. The embedded URLs likely serve as a lure to phishing or malware distribution sites.

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/wb?keyword=top%2050%20football%20leagues%20in%20the%20world%202019 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371553/normal_5f93fd5e8526d.pdfIn PDF document text
    • https://xoxaworik.weebly.com/uploads/1/3/4/0/134012931/ludezupudazap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385422/normal_5f93d94d2df2a.pdfIn PDF document text
    • https://zitidatuviwe.weebly.com/uploads/1/3/4/4/134493200/talazuxapewewox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453338/normal_5fba34f70ba89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388285/normal_5f8dea9fcaa6c.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/14129af5-cc59-4010-86f4-41f3ce362112/38987932038.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc14d4c5bcb0228a2853727/t/5fced9945c8977691e2bf229/1607391637115/xasomonafuzugizikupen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1987348-e893-40dc-801a-c1caa40baca8/nudedofewidovazena.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdcb84616306c7603b6accb/t/5fdce5a55c996550830f136b/1608312229690/login_page_bootstrap_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e23bb4d-e575-497c-a102-45b2338c7f52/kakijaloxiripat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15de7bd9-2c94-4d3f-8660-b8ed51f09cd0/30640946302.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/195b1d22-da8d-4765-86d9-ce90ea850155/banezose.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_off0000c7d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D6 6092 bytes
SHA-256: fa00ef22e1105bb77499feeefa4f1bcc9ee98af9b162acfb24d744701c710c2b
font_01_sfnt_off0000dc9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9B 10192 bytes
SHA-256: 75d4891946550c7d1723b58746557b5a8fd84f6baa077635a0c33fc1614ad129

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