Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea6e5ca3f05fa2d0…

MALICIOUS

PDF

67.1 KB Created: 2021-02-14 02:49:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: dee1745e2897ce834743a08bdab0cce3 SHA-1: e81157af10362ab8eba5f59334dd3032e0f23bf9 SHA-256: ea6e5ca3f05fa2d0e4d6da30000c5b72f4cf67478a2bca5bab2d443acb1364e7
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic firings indicate this is a link farm designed to direct users to potentially harmful sites. While no scripts were explicitly extracted, the nature of the embedded links and the ML classification suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/wix?keyword=bob+proctor+11+forgotten+laws+youtube In PDF document text
    • https://cdn-cms.f-static.net/uploads/4459629/normal_5fd1d38d2d05c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478148/normal_600cb05f45b01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366388/normal_5fee7414370f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415531/normal_5ff76ebe0d034.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445743/normal_5ff69e8b449ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387242/normal_5ff57ed1665f4.pdfIn PDF document text
    • https://dugaposiga.weebly.com/uploads/1/3/4/8/134857723/2705975.pdfIn PDF document text
    • https://gebekogekikak.weebly.com/uploads/1/3/4/6/134694855/zuxazowerisibaxoxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5fd61d77e1ee0.pdfIn PDF document text
    • https://kawuwulaf.weebly.com/uploads/1/3/3/9/133987507/wilarosomeref.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420905/normal_5fcc39ab22049.pdfIn PDF document text
    • https://taburexil.weebly.com/uploads/1/3/4/3/134374137/bawuno-xosirozi-sifubinuzut-nezeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459165/normal_6009ca39b81ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467036/normal_60035d2d12834.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/2941338649.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_off0000c94f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC94F 5620 bytes
SHA-256: e69a1e1e178846eee9c5d850aef5736a21f69b35dcc0003f531d44493113a4d3
font_01_sfnt_off0000dca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA4 10164 bytes
SHA-256: b42552349a8b63d268d0fd915025dada19fd941f0249035282911ba59e3565fa

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