Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7566a416e3da085…

MALICIOUS

PDF

112.9 KB Created: 2021-03-20 22:29:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3334759f233a4f6ad379b634320bfbf SHA-1: 7824349124c1b319e56750465e868970868da3fa SHA-256: a7566a416e3da0858255772a8523f8cf733686534fa156878cac5628145e80c0
104 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and it contains an embedded URI pointing to a suspicious domain. The heuristic 'SE_INVOICE_LURE' suggests the document's content is designed to trick the user into taking action, likely by clicking the provided link. No scripts were extracted, but the presence of an external URI and the invoice lure heuristic indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://jacksth.ru/wix?keyword=hole+in+my+life+chapter+4+summary
    • https://cdn.sqhk.co/satidaruxami/ighpZ0k/movie_quiz_2018_with_answers_easyquizzy.pdf
    • https://cdn.sqhk.co/gopefovepagi/UsiiiUz/crumble_controller_guide.pdf
    • https://cdn.sqhk.co/wowubumopem/qyifgha/87286580557.pdf
    • http://prizinsta24.online/89793202246zdq5j.pdf
    • https://cdn.sqhk.co/joxesinejag/F01ibB6/world_bowling_championship_3d_bowling_games.pdf
    • https://cdn.sqhk.co/vukupamita/ijXigpT/nugujilipos.pdf
    • http://golden-bridge.pro/motocross_bike_125cc_4_stroke5g99r.pdf
    • https://cdn.sqhk.co/luwokiseg/MhfBicp/red_lobster_near_me_hours.pdf
    • http://vvd.bar/vidas_secas_livro_ou_filmecorxz.pdf
    • https://cdn.sqhk.co/kafufojugure/ftZVPgg/vofexinoputegawilut.pdf
    • http://itdiscount.info/sony_music_center_app_not_workingr2h4a.pdf
    • https://cdn.sqhk.co/zupitefa/bhaicji/free_online_shopping_australia_all_in_one_apple.pdf
    • http://nesobaka9.xyz/925146113wv05x.pdf
    • https://cdn.sqhk.co/jemitaku/fiaBzLz/oscar_fish_hooks_voice.pdf
    • https://cdn.sqhk.co/fujalapevame/hmFigja/zigudaxebepekorujide.pdf
    • https://cdn.sqhk.co/kikolibub/8FqOQOk/island_in_the_sun_chords_tabs.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rurosaveruk/free_invoice_template_apple.pdf
    • https://s3.amazonaws.com/furunumaroxun/ganobusilewotavolopamem.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_off00017f5d.bin
a707f678c3dfb55f19b17247a393b065c4b3acff65df38338085f9562e0eede6
pdf-font-stream PDF embedded font (sfnt) at offset 0x17F5D 5404 bytes
font_01_sfnt_off000191a2.bin
e4df2a97c6d47fc2ac4e98f8e02efbd005862f0f64c75d03f4347051628982ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x191A2 10816 bytes