Malicious PDF — malware analysis report

Static analysis result for SHA-256 d63ae92ed8f32363…

MALICIOUS

PDF

72.8 KB Created: 2021-02-14 00:25:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ebef187b6a32de0a41c24ab45727532 SHA-1: ef5a3d25e97395615780499f4c05c96dd8ecfe85 SHA-256: d63ae92ed8f3236336ca0ffa3427f638f9f58e75143e296f335b8ed7008ce084
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'jacksth.ru', which is likely used to host a malicious payload or redirect to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a 'Paladin guide 4e', aligning with phishing or social engineering tactics.

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/wix?keyword=paladin+guide+4e
    • https://static.s123-cdn-static.com/uploads/4480182/normal_5ffd2143ee295.pdf
    • http://grusha.space/6802317211fi7at.pdf
    • http://buyfastedcircle.xyz/amu_b_tech_syllabus_2019qw4zv.pdf
    • http://beremoter.online/world_history_common_assessment_answersncjwz.pdf
    • https://cdn-cms.f-static.net/uploads/4475375/normal_5fe8e2fd40c38.pdf
    • https://cdn-cms.f-static.net/uploads/4368970/normal_60233763de549.pdf
    • https://static.s123-cdn-static.com/uploads/4470962/normal_5ff32f17ccc12.pdf
    • http://tranquils.space/best_tokaido_expansion9lszo.pdf
    • https://static.s123-cdn-static.com/uploads/4366010/normal_5fcb30616dc02.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ripazek.epizy.com/comparing_quantities_class_8_worksheet.pdf
    • http://latevafizatum.rf.gd/62755240979.pdf
    • http://figabubif.rf.gd/biology_books_online.pdf
    • http://figifikasiwaw.epizy.com/32523192219.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e34d.bin
0243279def55d6f4a798506875f369e4a7484a6b0c8454f1ceca36105d24023a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE34D 4808 bytes
font_01_sfnt_off0000f3c5.bin
11b5b683f84e7993aadb1dafdc112725404f11eeb724aa3f3d3e42729dfa8cb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C5 10332 bytes

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