Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd794a4253ade7f6…

MALICIOUS

PDF

77.2 KB Created: 2021-04-08 05:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdac12c466634d32c5ee2ad877aa1f3c SHA-1: 50cdb81960f071522c9ce217748d378e06820278 SHA-256: bd794a4253ade7f6140d5bae7a06ad0c4da2d271c7fe95a4c0d36424a893310a
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics as an external URI and flagged by a machine learning classifier. ClamAV also detected this file as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to search terms, directing the user to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://leonvi.ru/wix?keyword=los+mejores+dibujos+hechos+a+mano+con+lapiz
    • https://cdn.sqhk.co/gunonutib/Sgjgegh/where_to_get_boba_tea_near_me.pdf
    • http://mydenverneighborhoods.com/human_warfare_recordso38h2.pdf
    • https://cdn.sqhk.co/nalawanuxa/fdigGhj/mewaritusekojuzaterozelo.pdf
    • http://reawolt.online/the_division_gear_guidegy4ex.pdf
    • http://begdas.fun/toro_lawn_mower_repair_shops_near_megsaug.pdf
    • http://pimolala.22web.org/how_to_make_letters_on_google_docs.pdf
    • https://cdn.sqhk.co/doxurozupu/fgfjijd/70s_music_love_songs.pdf
    • http://jonebosu.mywebcommunity.org/lititoz.pdf
    • http://teaitalis.space/venn_diagram_lesson_ks2tcwt0.pdf
    • http://pukatasenibi.iblogger.org/nixon_mini_blaster_bluetooth_speaker.pdf
    • http://gifagudilul.mypressonline.com/baxemisuwakukesafafudiga.pdf
    • http://venira.su/343175148003rkq1.pdf
    • https://cdn.sqhk.co/rufomezin/ieUUgeO/exxon_stock_chart.pdf
    • http://emirofficialzm.com/508797417198vsiw.pdf
    • http://sagunutu.medianewsonline.com/31118077083.pdf
    • https://cdn.sqhk.co/pumevigatare/haxiije/basic_marketing_terms_and_concepts.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/goveruduzewoxu/27274365196.pdf
    • https://s3.amazonaws.com/kezemiradigu/99497233726.pdf
    • https://s3.amazonaws.com/dukavunivifa/celliant_sheets_canada.pdf
    • https://s3.amazonaws.com/nokiva/27978658646.pdf
    • http://boxesobalano.rf.gd/zaimki_pytajce_angielski_wiczenia_dla_dzieci.pdf
    • http://bamenawasez.epizy.com/74683487836.pdf
    • http://rivetibixonapaz.myartsonline.com/carnatic_classical_music_book.pdf
    • https://s3.amazonaws.com/rupatojuko/loguninowivolalasom.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_off0000ed98.bin
6e642a59b4437423f93e28638cc86012ac897cbd477c3cf6860c4451e448d2ea
pdf-font-stream PDF embedded font (sfnt) at offset 0xED98 5520 bytes
font_01_sfnt_off0001002d.bin
8d8e1bd9e0c3f53fb862d7ef47e84b6d6722028ca9c0dfd31f3d750e7fb79852
pdf-font-stream PDF embedded font (sfnt) at offset 0x1002D 11332 bytes