Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b63fdbd87bb40dd…

MALICIOUS

PDF

71.0 KB Created: 2021-02-27 19:41:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 399c8cd7156b5028416d27e841edf981 SHA-1: 4ab6c62134e2ebf345b87be505b9cb3f8af6808c SHA-256: 6b63fdbd87bb40ddbb999f11248be3de69c5a79369dd1b05fa5afbac485d0688
96 Risk Score

Malware Insights

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

The file was detected as a malicious PDF phishing trojan by ClamAV and an ML classifier. It contains an embedded URL pointing to a suspicious domain, which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, appears to be a lure related to communication types.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/award?keyword=tipos+de+comunicacion+no+verbal+kinesica+proxemica+paralinguistica PDF link annotation
    • https://cdn.sqhk.co/reriwoduriju/figijML/83514388197.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452395/normal_600f2d78a199c.pdfIn PDF document text
    • https://cdn.sqhk.co/kafexobesa/gdKQig4/color_bump_play_online.pdfIn PDF document text
    • https://cdn.sqhk.co/lebogomatoze/6ZpsuKT/power_warriors_12._0_apk_download_unlimited_money.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481695/normal_5fe55f585372d.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/47921445359.pdfIn PDF document text
    • https://cdn.sqhk.co/kubepugemaki/JYhLzic/oconomowoc_high_school.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454180/normal_5fe7c1ebb62a9.pdfIn PDF document text
    • https://cdn.sqhk.co/diratukuz/MUXgfIp/flight_simulator_games_online_free_unblocked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368760/normal_6019840610481.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468274/normal_6025d0fd0bcc7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sorogamat/gonolizafupuziwidiwu.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/refudomifisiwa.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/42912108762.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_off0000d94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94B 5672 bytes
SHA-256: 9a845151ca6e1c169bcd2af7f51bb70a5214ecf1129b9b0b681cf40eed53a229
font_01_sfnt_off0000ec83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC83 10104 bytes
SHA-256: f0dc17e8a6f3d54e4cef93ae770b76f13f580a832126980b6dc09a7d2a07e56e