Malicious PDF — malware analysis report

Static analysis result for SHA-256 edbf85c5df1acca9…

MALICIOUS

PDF

77.7 KB Created: 2021-03-19 10:50:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 125e35e10232d103413afdccffe2101a SHA-1: 2c98740b238135f108c605231ce19f162d576a2e SHA-256: edbf85c5df1acca96efce21c5df7bbafd67fc0cc76d206e8571002f0e8969ba7
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL disguised as a search result. The ML classifier and ClamAV detection strongly indicate maliciousness. The primary URL, 'https://golowaki.ru/123?utm_term=1happybirthday+video+song+with+name+free', is likely used to redirect the user to a malicious site. No scripts were extracted, but the presence of external URIs and the overall detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/123?utm_term=1happybirthday+video+song+with+name+free
    • https://cdn.sqhk.co/zitedefew/gejdEsX/31591587419.pdf
    • https://cdn.sqhk.co/jivazufevi/pgiRuKV/resident_evil_7_vr_pc_download.pdf
    • https://cdn.sqhk.co/kukusagufo/ggeU11a/inspiring_intro_music_free.pdf
    • https://cdn.sqhk.co/wamitavixitu/JheW6Mn/novel_study_lesson_plan_template.pdf
    • https://cdn.sqhk.co/rozesivotix/cOieb5T/escape_the_prison_game_online.pdf
    • https://cdn.sqhk.co/rijizedot/cjaifif/34892878250.pdf
    • https://cdn.sqhk.co/tobijoge/ngdrNgc/98971277448.pdf
    • http://doctorzlo.com/nutozezudibetexofapuwhhqv4.pdf
    • https://cdn.sqhk.co/rokabumake/hdicZMU/exploration_lite_craft_free_download.pdf
    • https://cdn.sqhk.co/wediximewoza/ii9jchi/space_invaders_unblocked_games_66.pdf
    • https://cdn.sqhk.co/guranotup/jqjjivz/california_reaper_pepper_challenge.pdf
    • http://youla-24.cc/silivuxobewetoruwuvijerjjqpr.pdf
    • http://itclick.info/xosudab4e9og.pdf
    • https://cdn.sqhk.co/reriwoduriju/3kyPiep/microsoft_planner_in_teams_ppt.pdf
    • http://twirlini.com/5671792242gytcj.pdf
    • https://cdn.sqhk.co/dugelabomaw/jjihfji/44189863622.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8a018f82-fa7c-4e39-8b12-10bb95fe1d91/49010764902.pdf
    • https://s3.amazonaws.com/megulu/esc_eacts_guidelines_on_myocardial_revascularization_ppt.pdf
    • https://uploads.strikinglycdn.com/files/fcb30624-2ffc-4152-b76a-6e7429620327/wufeju.pdf
    • https://s3.amazonaws.com/xixonu/85295413761.pdf
    • https://uploads.strikinglycdn.com/files/fedf32e1-93d1-43f7-9a73-1d687c533530/35640237162.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_off0000ed89.bin
b48f1c62b36ced2f2bb0866f615e4b2277ef686a71a99b27d16dec2cb40841b4
pdf-font-stream PDF embedded font (sfnt) at offset 0xED89 5772 bytes
font_01_sfnt_off00010122.bin
88305c4a134ad5e874f5f0f8691a80d7a2571d223de14c5b7b0576b300c335c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x10122 11920 bytes