Malicious PDF — malware analysis report

Static analysis result for SHA-256 72ae01b69d70ed5e…

MALICIOUS

PDF

83.6 KB Created: 2021-01-17 04:13:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: beb4f0a091469f98a2abb68d0451899e SHA-1: eae42df545229162b56f4994babb886d39917bdb SHA-256: 72ae01b69d70ed5e566f5a28c3aefd2b812d090579443da95f57145d889faa43
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload. The document body is heavily obfuscated and unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffe.ru/123?utm_term=uno+swap+hands+card+as+last+card PDF link annotation
    • https://cdn.sqhk.co/narobalof/iaNXapJ/doxobevogovitemo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385617/normal_6000d2e6809b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421341/normal_5f9d3fd001d9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446394/normal_5fa6a377d1ca4.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/sheicjg/treasure_hunt_online_games.pdfIn PDF document text
    • https://site-1196795.mozfiles.com/files/1196795/battle_for_wesnoth_cheats.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369313/normal_5ff1880bdad69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370054/normal_5f89374e9385d.pdfIn PDF document text
    • https://cdn.sqhk.co/bizujonad/xMJifYw/61819802070.pdfIn PDF document text
    • https://site-1254116.mozfiles.com/files/1254116/76264387000.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/lihhdIE/best_health_tracker_apple_watch.pdfIn PDF document text
    • https://site-1178369.mozfiles.com/files/1178369/sight_words_grade_3_worksheets.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458829/normal_5ff3ac43d2b88.pdfIn PDF document text
    • https://cdn.sqhk.co/fodibaniwe/hiayTjb/17482145808.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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_off0000fe57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE57 4864 bytes
SHA-256: cd10421f9a92ceb10fb291b40d8b4d361f24360ebfa09c5c8a13963216675428
font_01_sfnt_off00010edd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDD 10712 bytes
SHA-256: 0e0827db14db0e5ed240e4074dd248351b23d0456edaf7e671533c47397b89d0
font_02_sfnt_off00013387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13387 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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