Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9525bf48e55fe06…

MALICIOUS

PDF

77.5 KB Created: 2021-02-18 16:48:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ceff9ad471287a84686e5f190cd27ffc SHA-1: 468a8ba199b3054026f5da2fa3b3a3962f1de6c3 SHA-256: a9525bf48e55fe06126017514421d7ea5a5976efca87f458ea4bb8ba07f9de47
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a malicious domain, likely to deliver a phishing page or malware. The document body, though heavily obfuscated, appears to be a lure related to a search query. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=what+is+the+land+grant+university+in+texas PDF link annotation
    • http://stav-games.ru/rogofuhvu3.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/jfidGic/xekagujiguforarebiwijapef.pdfIn PDF document text
    • https://cdn.sqhk.co/xupotuferu/mf352gg/37026070824.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413019/normal_600f0243378d9.pdfIn PDF document text
    • http://cosmeteca.com/crash_car_driving_2019_usafcylv.pdfIn PDF document text
    • http://edarudost.online/allegro_pcb_editor_training_manualytxiv.pdfIn PDF document text
    • https://cdn.sqhk.co/widafopaj/LheiacG/ninja_jump_game_2.pdfIn PDF document text
    • https://cdn.sqhk.co/tulazofava/vjjhaia/kung_fu_panda_3_netflix_canada.pdfIn PDF document text
    • http://sallles.ru/basic_automobile_engineering_notes0h4tu.pdfIn PDF document text
    • https://cdn.sqhk.co/dodagirojep/jdghDlD/16629498508.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475196/normal_60147b6d19b4c.pdfIn PDF document text
    • https://cdn.sqhk.co/sepovili/iedqbha/double_arrow_pointing_up_symbol.pdfIn PDF document text
    • https://cdn.sqhk.co/deliwewofok/iYwyzOv/kifeboredenolerij.pdfIn PDF document text
    • http://amin-ukraine.net/31513979464o3i59.pdfIn PDF document text
    • https://cdn.sqhk.co/minederepa/hjQhgcK/pixel_swordfish_io_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/risenulowo/jjhfGta/zofaluliw.pdfIn PDF document text
    • https://cdn.sqhk.co/rubogomuweme/MichbLg/best_weekend_deals_ireland.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A1 5332 bytes
SHA-256: d21f43b42ffa5f692a2af2d8a15f20ab3b37cf120dc0acd441ab2391fea44a19
font_01_sfnt_off000103cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CF 10748 bytes
SHA-256: e677711bd5db2108d80960124620dba6fb286bb2040433704fbb96109143240d