Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5def5b268e1b5b3…

MALICIOUS

PDF

78.1 KB Created: 2021-03-26 12:41:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0157920ab7d3b915646c1f42ae0381d SHA-1: 42c83204cb20ef67e0a7fa4a0fef6618d5803856 SHA-256: a5def5b268e1b5b34de580caf90ec861409defee8704f0f2f0d3db986a181e65
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though heavily obfuscated, appears to be related to the keyword 'gastroparesis', suggesting a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://nipisod.ru/award?keyword=gastroparesis+adalah+pdf
    • https://miremawa.weebly.com/uploads/1/3/4/6/134631892/lojilesu.pdf
    • http://bagesopabiwub.scienceontheweb.net/tozorokuw.pdf
    • https://woxazalaxit.weebly.com/uploads/1/3/4/2/134235403/7ee9c.pdf
    • https://jagavovukivotu.weebly.com/uploads/1/3/4/8/134881855/vewipafod.pdf
    • https://cdn.sqhk.co/wevexifimur/gcheYie/alienware_desktop_reviews_2020.pdf
    • https://cdn.sqhk.co/vemudumuxixu/Ejgiiig/flash_alerts_2_pro.pdf
    • https://cdn.sqhk.co/pakelabete/dgcjdif/takeout_food_to_eat_near_me_open_now.pdf
    • https://majuzifulanapu.weebly.com/uploads/1/3/4/8/134887757/3491de402a.pdf
    • https://cdn.sqhk.co/rorajakura/jijBgiK/iot_security_architecture.pdf
    • https://luzafoku.weebly.com/uploads/1/3/0/8/130814295/xepusefow.pdf
    • http://zotaliburex.iblogger.org/luledaxenaru.pdf
    • http://fuwiduwoxobol.mygamesonline.org/britax_boulevard_clicktight_height_limit.pdf
    • http://mafesilotob.iblogger.org/flower_clipart_vector_free.pdf
    • http://fogejebimo.scienceontheweb.net/hernia_de_hiato_classificao.pdf
    • https://cdn.sqhk.co/kelopifagisu/2siaHhc/forbidden_lands_character_sheet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pipaneku/31721872429.pdf
    • http://mewuxugeje.epizy.com/82182695949.pdf
    • https://s3.amazonaws.com/sinadi/vawodixom.pdf
    • http://donolipapaxe.rf.gd/terraforming_mars_corporations.pdf
    • http://zopetudivukuka.rf.gd/fusegisaz.pdf
    • https://s3.amazonaws.com/rekorewexidiwo/49448307975.pdf
    • http://nemenarubaz.atwebpages.com/73780167027.pdf
    • http://jaxojuru.rf.gd/circle_and_circumference_worksheets.pdf
    • https://s3.amazonaws.com/fokapikow/pozebubawusajilinom.pdf
    • http://kitilogokufalu.atwebpages.com/allahabad_high_court_result_2020_download.pdf
    • http://satanomoxa.rf.gd/5228170998.pdf
    • http://migaxutajudoxu.epizy.com/prentice_hall_algebra_2_teaching_resources.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_off0000ee8b.bin
d53c513cd74302a28c84c7bc8648a14852f068f6d5326818d05fa61cedb7be94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8B 5160 bytes
font_01_sfnt_off00010014.bin
0d64c05f8f471dfb348167738abceee0c2d0b522130351834ae8083c1492b2e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10014 13616 bytes

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