Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e71424ac499a315…

MALICIOUS

PDF

80.0 KB Created: 2021-01-12 13:42:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 014e490ebb12e60c60dc2b3d58281d43 SHA-1: 4dcd46fb11fdb90c7666555eca854f37a101458e SHA-256: 9e71424ac499a315caff532fcd6d1e2e39ce83aec7f0fdc86efbba99cda573d2
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded URL is likely intended to lead the user to download further malicious content or to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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.
  • 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://traffking.ru/wb?keyword=free%20online%20screen%20recorder%20no%20download%20no%20java In PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/lorewuk.pdfIn PDF document text
    • https://cdn.sqhk.co/kuruwoke/ha7PwRG/the_managers_path_epub.pdfIn PDF document text
    • https://refapezi.weebly.com/uploads/1/3/4/9/134904673/3c10e651.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487191/normal_5fe10bea57afa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470833/normal_5fac148c6cb60.pdfIn PDF document text
    • https://mexubigewexuni.weebly.com/uploads/1/3/1/3/131384635/jozigowusojowuja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366048/normal_5f8e06ec57af9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369802/normal_5f92f800e7ab1.pdfIn PDF document text
    • https://site-1167954.mozfiles.com/files/1167954/canada_simulator_2_close_to_call.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487187/normal_5ff8622da5656.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3D 4032 bytes
SHA-256: 13797087b93b1e9e094a63775f5415c6c74312c8605fb8c7f1ea838c215100d5
font_01_sfnt_off0000fab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB7 5116 bytes
SHA-256: 60dd77ac19e8fbdadd350628eee6a376f22d8bdf387ba16f3cdbb45c1e347bf7
font_02_sfnt_off00010c48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C48 11720 bytes
SHA-256: 9e0effef838a08256021965e71a8e5f46621046ace4bdf25e6e514ff7f76dee4