Malicious PDF — malware analysis report

Static analysis result for SHA-256 5893b11d81457e50…

MALICIOUS

PDF

71.9 KB Created: 2021-02-03 16:17:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: cb9fe974334ec1f2dc76d5d35b138535 SHA-1: 7587795bb8217a24f1a1f553e3221b71fe449aaa SHA-256: 5893b11d81457e50433cd0b4a7cac20278e60b989adf172fadc024f8af20893d
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://seumenha.ru/123?utm_term=advent+puppet+skits', which is likely used to redirect the user to a phishing or malware distribution site. The document body is heavily obfuscated and unreadable, but the presence of external URIs and the malware detection strongly suggest a phishing or downloader attack pattern.

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://seumenha.ru/123?utm_term=advent+puppet+skits PDF link annotation
    • https://cdn.sqhk.co/bipadifudame/OOHNKhe/devlet_su_isleri_genel_mudurlugu_21._bolge_mudurlugu.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/dnpLjip/dice_tray_and_storage_diy.pdfIn PDF document text
    • https://cdn.sqhk.co/kaxejelun/hdyjgi6/39286774100.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457592/normal_5fd5f600ba7b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486965/normal_5ffe79eed7316.pdfIn PDF document text
    • https://cdn.sqhk.co/fasazani/gfz0geB/super_kart_for_sale.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412396/normal_600150c2c65e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458163/normal_5fd66f2742913.pdfIn PDF document text
    • https://cdn.sqhk.co/minamojazi/eGjh2ZK/jelly_band_hand_sanitizer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453105/normal_5fe9d2ddd34b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481164/normal_6011121220b1e.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/joHbsgd/28262882172.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvonazavo/hiijdih/the_vikings_season_7_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/navotezive/Ijf7ic0/77678684592.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/nafibanefexex/salupi.pdfIn PDF document text
    • http://zusirutovazume.epizy.com/barclays_for_intermediaries_mortgage_current_account_form.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_off0000dfd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD3 4728 bytes
SHA-256: 5eeb0260f4cbbd4101a4ba6cef46229b710bd45e1db6e34b96aeb15c5aa221d5
font_01_sfnt_off0000f00a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00A 10236 bytes
SHA-256: 49fa9eee08089701119c2630c7404c221f6c6f81c9029765f8590aee4ebe673a

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