Malicious PDF — malware analysis report

Static analysis result for SHA-256 b456e597965516ce…

MALICIOUS

PDF

69.3 KB Created: 2021-03-30 06:34:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21f3d714fc96fc5793479099fa5b63bf SHA-1: 1ed6b0174e5fe0116f70b6e275508e6477b59cd3 SHA-256: b456e597965516ceb2da69d76e16d8ab560b3ec83ce689f98cd3f083f5cec808
96 Risk Score

Malware Insights

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

The file is a PDF containing obfuscated content and an embedded URL. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically a phishing attempt. The embedded URL is likely intended to lead the user to a malicious site, possibly for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://xezojetit.ru/award?keyword=artificial+intelligence+course+notes+pdf
    • http://nemogaguwexero.iblogger.org/karezexesodimi.pdf
    • http://pazobano.iblogger.org/bajrangi_bhaijaan_movie_ka_song.pdf
    • http://saniwigudovo.scienceontheweb.net/active_and_passive_voice_present_exercises.pdf
    • http://vudujupuboneg.22web.org/21664309427.pdf
    • https://cdn-cms.f-static.net/uploads/4410211/normal_6041e7cb7aef9.pdf
    • http://markettop.pro/visiwafwuwe8.pdf
    • https://cdn-cms.f-static.net/uploads/4483870/normal_601d52a66fd92.pdf
    • https://cdn-cms.f-static.net/uploads/4494146/normal_6040aff8efafb.pdf
    • http://mizikekow.22web.org/color_personality_test_red_blue_yellow_white.pdf
    • http://wdd13.ru/mizibepanujugop0424c.pdf
    • http://thecabinets.xyz/ideal_team_player_review0yznc.pdf
    • http://pozesex.iblogger.org/dikunesebawigupuf.pdf
    • http://copyright-notice-ig.com/mepidokinojoxenorignl6z.pdf
    • http://vladmer.ru/free_printable_synonym_worksheets_grade_3bjkow.pdf
    • http://gokuluzed.iblogger.org/xuwuregoger.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gajovab.epizy.com/26303863957.pdf
    • http://wogekipa.rf.gd/98090680522.pdf
    • http://dojukagufeni.epizy.com/glencoe_geometry_chapter_7_test_form_2c_answer_key.pdf
    • http://rovijog.rf.gd/6th_grade_common_core_math_practice_test.pdf
    • http://zuxokoberibaw.atwebpages.com/how_to_use_procreate.pdf
    • http://pofazutufugu.epizy.com/geligirividujoputuvilu.pdf
    • http://zenijesadimikig.rf.gd/what_are_some_good_psychology_questions.pdf
    • http://divojeniro.epizy.com/five_nights_at_freddys_vr_game_download.pdf
    • http://vawupebudifi.rf.gd/cache_memory_concept.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_off0000d1cf.bin
095969a672477b715a924c478283a97dfe96a2326f91fafae25ea01880438974
pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CF 5312 bytes
font_01_sfnt_off0000e3f0.bin
2d5bf3ba705319f7c44a72e1ae41b5d330f7e5a912dd9d15e99a8491a7c9fe92
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F0 10100 bytes