Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e72259380828dd7…

MALICIOUS

PDF

70.0 KB Created: 2021-01-28 21:06:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b94660f7df6004218fe2b92a7a6790dc SHA-1: e8ea96474d2966955e0b469574c3828b177baca8 SHA-256: 1e72259380828dd75a147a4bf8e0d9af97cae4ce1048086b8dfb3c3cf07124c3
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and the document body suggests a lure related to medical terminology. The presence of a malicious ML classifier score and ClamAV detection strongly indicates malicious intent. The embedded URL points to a suspicious domain, likely used to host a phishing page or download further malware.

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://crophysi.ru/123?utm_term=acoustic+medical+terminology+definition PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4448103/normal_5ffbb4342f6a1.pdfIn PDF document text
    • http://shoop-fg.ru/pajozuvudugalinujaflm8un.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467007/normal_5ffe4c834901a.pdfIn PDF document text
    • http://info-pages.ru/headache_diary_printablea5f0r.pdfIn PDF document text
    • http://mail-autoscout24.net/dungeoning_idle_dungeon_crawler_modtd7e5.pdfIn PDF document text
    • http://xavelodezazil.iblogger.org/procedimiento_disconformidad_alta_medica_inss.pdfIn PDF document text
    • http://yewes.fun/namonugofil8mdok.pdfIn PDF document text
    • http://vnatural.space/kart_racing_pro11sej.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/kizugokofo/gcse_biology_magnification_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/formal_way_to_apologize_for_late_response.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/wolakinilomoninoxatogu.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/nebava.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/natelobemi.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/40199985156.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/comcast_tv_channel_lineup.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_off0000d697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD697 5432 bytes
SHA-256: cbfa17c428c46b6720eed6fe02d000810ee51565cf38efa3172f9e744ada4c39
font_01_sfnt_off0000e8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FF 9952 bytes
SHA-256: f799d7d8c07583b2980ce1b5d07bd0ece31dcfc8b295c289020b98c77978f68b