Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe648e85527b4fb3…

MALICIOUS

PDF

69.8 KB Created: 2021-02-11 15:02:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d75dc7b187294228f0a2d435a9356795 SHA-1: 6a43678e235f9696422d8f4b6dc25a2b54eaec2d SHA-256: fe648e85527b4fb39e6a978014bbad0d729caa90db18f016d840b3beea8b3f48
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, and ClamAV detected it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to a 'myers briggs test pdf'. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent, likely to redirect users to a phishing site or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wb?keyword=official%20myers%20briggs%20test%20pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475988/normal_5fe7977317bb8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447641/normal_5ff7d9aedf13e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382638/normal_6022454110327.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463308/normal_5fc7f867ef398.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375207/normal_601aef14318e5.pdfIn PDF document text
    • http://kino-vezde.ru/1058451443ybvpn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374188/normal_5fd7df7fd3c8b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490917/normal_60040f81057f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498978/normal_5fed16ba135e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479905/normal_5fe7d6340e2d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443812/normal_601073e21fe1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381095/normal_602334d9e88ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370985/normal_5ff8b61c857eb.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/kubafezin/bezivabazefizupipimo.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_off0000d22e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD22E 5744 bytes
SHA-256: 04bbb59e16ae9533c3712d787b4e820a5c1c0a0ee68d04b004ed9863c55913fc
font_01_sfnt_off0000e5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A4 10904 bytes
SHA-256: 03bec1c7c397bf7fdade7fc2624dc4b174c0fa10338e1d873b3f6bf529f252de