Malicious PDF — malware analysis report

Static analysis result for SHA-256 504a22a2278734e0…

MALICIOUS

PDF

93.5 KB Created: 2021-03-07 17:18:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 619733f1773d6c490b549f6bc191a9b3 SHA-1: ca5dbcbc8e01667763598a9e3df624c852e26ca0 SHA-256: 504a22a2278734e0f921151df720f482687783b4af1a8d690346570ccca5a7b4
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URI that points to a suspicious domain, likely intended to trick the user into visiting a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to lead the user to a malicious resource, potentially for further exploitation.

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://bologen.ru/wix?keyword=vocabulary+from+latin+and+greek+roots+unit+one+answers PDF link annotation
    • http://shoop-fn.ru/bdo_archer_skill_addon_guidegzrk0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472764/normal_6004d703a8f1a.pdfIn PDF document text
    • http://pesale.pro/perdona_si_te_llamo_amor_pelicula_trailer_espaol_version_italiana0ztni.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366005/normal_5fde7352286e3.pdfIn PDF document text
    • http://golosa-spasibo.ru/daniel_kahneman_thinking_fast_and_slow_sparknotesmt4l1.pdfIn PDF document text
    • http://netewe9.xyz/screen_stream_mirroring_pro_apk_2._6._2lw7j9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448129/normal_6018d4963ec3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378834/normal_5ff247e905049.pdfIn PDF document text
    • http://jumbochecker.com/sakugubumaruxenegimelam3e89b.pdfIn PDF document text
    • http://vitalia-transports.com/nakawenizegeperovaty49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477373/normal_604324530621f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zerakunutage.epizy.com/vonuwofaw.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/vaxotokarumurepegumol.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/21707665792.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/getezisaj.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/nupuguwebizigudepuvuxa.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/miwimomapabukuxagozibupa.pdfIn PDF document text
    • http://nabobaze.epizy.com/94494117096.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/rovoroxawepu.pdfIn PDF document text
    • http://jedalavupu.epizy.com/application_form_for_student_loan_forgiveness.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/mepujibewakemijitubebim.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/92683192538.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/kuworutimewupogixu.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_off00012f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F93 5704 bytes
SHA-256: f10739c5b485bfeb659e4910a1ad231c9240bf306803da1c533b3efd0bebbd1a
font_01_sfnt_off0001430d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1430D 11088 bytes
SHA-256: c81d96b06f89648938e4bb91b8a7d7361cdf9762b1be5d00e0fd152ad068b317

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