Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9726bd9f2c05e55…

MALICIOUS

PDF

77.9 KB Created: 2021-04-19 00:14:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7478de39bba4e84411f51d87aa3a363c SHA-1: 763531ac307f1b57f797601055698f782e7dad41 SHA-256: a9726bd9f2c05e55ea0a72bdf07bfdc8e397c31f98eca6d70fd7ccb1d2609de1
96 Risk Score

Malware Insights

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

The PDF 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://xezojetit.ru/strik', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to a 'Romeo and Juliet book report'. No scripts were extracted, but the presence of malicious URLs and the overall detection profile strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/strik?utm_term=romeo+and+juliet+book+report
    • http://autobaff.xyz/watopiqj29s.pdf
    • https://cdn.sqhk.co/batumozi/dxeheia/butajixad.pdf
    • https://cdn.sqhk.co/liwifetil/gfMhbzw/university_of_miami_online_blackboard.pdf
    • https://cdn.sqhk.co/videmixolute/7gdTjgP/87547214579.pdf
    • http://gk-kuban.ru/best_criminal_lawyer_houston1gfjo.pdf
    • http://cardioactiveitalia.site/calculator_vault_app_hider_apkpure13gf2.pdf
    • https://cdn.sqhk.co/sezunofubuzi/hfnxHje/13399508447.pdf
    • https://cdn.sqhk.co/bebumula/ozWSi8d/low_carb_diet_list.pdf
    • http://yoga-fitness.space/lototusadulujetudukobopa99gpw.pdf
    • http://afracheat3.xyz/83057818154qpirk.pdf
    • https://cdn.sqhk.co/rebosuvut/zgEHjfT/gold_farm_wow_8._3.pdf
    • http://peludofnor.fun/sugirimomurulololalusipavu1zdt.pdf
    • http://siwexisikig.22web.org/betrayal_legacy_rulebook.pdf
    • http://naturalgood.space/3858063801610lqs.pdf
    • http://fukikenikiru.22web.org/spelling_bee_grade_2_word_list.pdf
    • https://cdn.sqhk.co/kusamika/v9bBhg2/xomuzomun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://taxonegak.rf.gd/jafokoxutula.pdf
    • http://foridifakusexum.rf.gd/bronconeumonia_definicion.pdf
    • http://pasazaxara.rf.gd/aoc_envision_series_32_manual.pdf
    • http://zavinawotomuvef.epizy.com/53194287845.pdf
    • http://vamuxusonepuf.rf.gd/48343528892.pdf
    • http://tugefewose.rf.gd/adam_interactive_physiology_free.pdf
    • http://zezewesiwakoruw.rf.gd/convertir_en_ingles_a_espaol_gratis.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_off0000f1ea.bin
2b1c3e199447a6d10f55e35aab4d7b85fa629473350ac42d7ef0f5378c530f6c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EA 5212 bytes
font_01_sfnt_off00010391.bin
fcd491cfc4efa5f0ff305bbdac6c75ad065f9d2b569165b46234eeb41d4e86fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x10391 11628 bytes