Malicious PDF — malware analysis report

Static analysis result for SHA-256 33e6218a0e10ca4d…

MALICIOUS

PDF

76.8 KB Created: 2021-03-22 08:36:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d7d5c9b53a65d29807aafaa46cdb5d73 SHA-1: 61d26b418d4108109e183c7ab02012135950eb32 SHA-256: 33e6218a0e10ca4de7218c3a0061d0553e1e677eb27cdbc8871179af27b7f513
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, likely intended to redirect the user to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains keywords related to quantitative aptitude, suggesting a lure to disguise the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gimoguvi.ru/award?keyword=quantitative+aptitude+questions+tricks+to+solve+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426820/normal_5ff87d61b569c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460709/normal_5fcd7f3b7fbb3.pdfIn PDF document text
    • http://wildboost.club/why_is_my_whirlpool_washer_not_agitating1dtok.pdfIn PDF document text
    • http://fajufoturesu.sportsontheweb.net/gejegizo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502906/normal_6053bf4bb6c80.pdfIn PDF document text
    • http://lubevos.scienceontheweb.net/jeff_buckley_hallelujah_piano.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/canon_mp240_printer_driver_windows_xp.pdfIn PDF document text
    • http://latitekiwa.scienceontheweb.net/public_health_nutrition_2nd_edition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500668/normal_602b987a9dc72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416664/normal_6006213690dad.pdfIn PDF document text
    • http://todayit.pro/converter_em_word_e_excel7ipht.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466673/normal_5fe218ae1a5fc.pdfIn PDF document text
    • http://kepukarob.sportsontheweb.net/silvercrest_espresso_machine_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365656/normal_5fded401bf8bb.pdfIn PDF document text
    • http://visunuduxat.mypressonline.com/sazogixanames.pdfIn PDF document text
    • http://chambrely.xyz/adorno_dialektik_der_aufklrung_zusammenfassungc8lhy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383692/normal_600968cfeaecc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484994/normal_6022abf06803c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sidepojedava.myartsonline.com/get_ielts_band_9_grammar_secrets.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/codycross_answers_group_201_puzzle_3.pdfIn PDF document text
    • http://bivojeda.atwebpages.com/93058024479.pdfIn PDF document text
    • http://ralirajuz.atwebpages.com/nakikakepupel.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/safety_data_sheet_binder_table_of_contents.pdfIn 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_off0000eca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA6 5460 bytes
SHA-256: d92ba742a09fcac297736b588f6b066ca60c028edb728ed9810845c5491b47c2
font_01_sfnt_off0000ff50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF50 11548 bytes
SHA-256: bc307f0c07405dc8f4b0f4c5cd38c18a2335b863574c448cdfbc671d5357a46e

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