Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e583900f80a4665…

MALICIOUS

PDF

71.6 KB Created: 2021-01-24 12:05:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 640f834e16bcca47d54af81ee8dc8c6c SHA-1: 9a289063bc489b1a1cce204ab4a0ac2574d462b7 SHA-256: 3e583900f80a4665d71ed23934fe0d143b1b1bbad5fc018573bca5e14b579be4
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that appears to be a lure for downloading content, which is a common tactic for phishing or distributing further malware. The document body, though heavily obfuscated, suggests a wallpaper theme, reinforcing the lure aspect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/aws?utm_term=wallpaper+3d++name PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4494139/normal_5fde2d8077711.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471691/normal_5ff7610b154f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450512/normal_6000f83aadd0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372723/normal_5fe227a902724.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489240/normal_5ffe7a7655b72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488137/normal_600d2d698c4d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413585/normal_5fccd3090f3c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416666/normal_5fd7a6dc688ac.pdfIn PDF document text
    • https://cdn.sqhk.co/niporatibu/hcgfq3r/kofetadivaxozawijud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412897/normal_5fcd8e8581356.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503279/normal_5fd62dcc21115.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371808/normal_5fd098fdd9ad4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418175/normal_5fe47e14efa6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413231/normal_5fc8d6bfc8c32.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
    • https://s3.amazonaws.com/mejobu/ziwuditusisemewi.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/99840589853.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/metric_system_length_conversion_worksheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD138 4656 bytes
SHA-256: deaaba526d593026ad64d5a57ab23931509c417eaba90f432d5dfd03da730332
font_01_sfnt_off0000e0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E3 10104 bytes
SHA-256: 8cf764c5d5514ce5cbe99b8b85d671f1d78bb7dee26dd90ac886b75b4f7f878a
font_02_sfnt_off00010384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10384 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.