Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e5eaaad227de0f2…

MALICIOUS

PDF

71.2 KB Created: 2021-02-18 15:40:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6ecf9b453413037a2334d7ab875c667a SHA-1: f94b236ab247794b55b1361729e44ff8367d24ca SHA-256: 8e5eaaad227de0f26374a7205cb83029bd6583dab05cd92976352dbd01741811
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, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'seumenha.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 book title, indicating a social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=literature+a+portable+anthology+4th+edition+gardner+et.+al PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4388280/normal_5ff8d87d7b41b.pdfIn PDF document text
    • http://naykaryadom.fun/the_illusion_of_life_disney_animation_free_downloadovarq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383795/normal_5ffe17f6615ee.pdfIn PDF document text
    • http://look-hotel.com/perfect_modals_passive_voice_exercisesib1cm.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/rorives/amazon_prime_video_mirzapur_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/cmhc_rental_market_report_vancouver.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/dagoxujizexujedifemiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/30378308835.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/india_before_christ_history_in.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/pandora_silver_bracelet_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/negative_fractional_enlargement_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/inhalation_sedation_in_dentistry_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/psicologia_de_la_motivacion_uned.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/batwoman_comic_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/magic_circle_charger_android.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/xewaxebovezaf.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/46173199366.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_off0000ca9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9D 5228 bytes
SHA-256: cb17b464046f68e1715bfb6477ce45baba9c346504a2025fa68b4953c91bbc72
font_01_sfnt_off0000dc59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC59 10280 bytes
SHA-256: 540c0ffb8dca2390f6474195b4d7deac9d72cb76af97cfaece1d3b517f197458
font_02_sfnt_off0000ff3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3B 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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