Malicious PDF — malware analysis report

Static analysis result for SHA-256 716777ec534eed96…

MALICIOUS

PDF

67.8 KB Created: 2020-12-18 16:55:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b99118ca294c8078672694bbd0af7fda SHA-1: c32f31dbaca092a52221cfa57211cba0fd54678f SHA-256: 716777ec534eed96d8c9616bd568592a25e67b9df71eb2bd182acaa569e49c70
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The embedded URLs, particularly 'https://trafficel.ru/strik?utm_term=lion+king+kiara%2527s+cubs', suggest a phishing or malware distribution lure. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/strik?utm_term=lion+king+kiara%2527s+cubs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373769/normal_5fab9a2cc0e5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381098/normal_5f9ba7514c8aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379234/normal_5f8dfc222e690.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427506/normal_5fc3e33358cca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384304/normal_5f91520735828.pdfIn PDF document text
    • https://jepuderakemuso.weebly.com/uploads/1/3/4/6/134666912/punimusoposamunud.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/45676bb9-834c-47f1-8b76-80e3bdfb5917/dujabusabi.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/67097239044.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1b6c78787e8798971b212/t/5fc3b2253485235c8637979f/1606660646169/xotelipagolipevobixuboj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccec336c-f952-4907-89b3-e97553b5e0fe/fumijelefon.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/jegobodanerejaro.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunoje/19149499489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e40f755-0798-43f5-9c57-7f7ec0c64e37/80493627466.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfa3a8bc8713fe6fd9498/1606220347190/xunijemisenazewuwu.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_off0000cc65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC65 5116 bytes
SHA-256: caf6e8b4347306396bc941c46d034ab6c4eacab8e58b69a8a9bb5092eddc13d3
font_01_sfnt_off0000ddec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEC 10744 bytes
SHA-256: 3216d56aae0ee0ce41d7638dc264bb0584c4fec59d43c3355aabb15b23b1f711

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