Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cba7185315c53d5…

MALICIOUS

PDF

76.2 KB Created: 2021-03-27 15:36:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3084d5d0c3093af57ca29b4ec5812f82 SHA-1: 0267e987be82f6912287f865315d5a7d4605ffcb SHA-256: 9cba7185315c53d51f333c05ebeb15f85d80c0d9d4343185d8caa8b14c82a697
96 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as phishing malware by ClamAV. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading further malicious content. The PDF structure and embedded URLs suggest an attempt to deliver a malicious payload disguised as a document.

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://nipisod.ru/award?keyword=once+upon+a+dream+a+twisted+tale+pdf+free
    • http://judifino.iblogger.org/mastercam_x9_lathe_tutorial.pdf
    • https://suzeziji.weebly.com/uploads/1/3/0/7/130739492/1573887.pdf
    • https://vajawopi.weebly.com/uploads/1/3/4/5/134597817/7c8662ccce.pdf
    • https://cdn.sqhk.co/faxixuwako/geiacVy/5150145218.pdf
    • https://cdn.sqhk.co/panufarubel/sc1hbjf/conversions_of_units_worksheet.pdf
    • https://bituxusod.weebly.com/uploads/1/3/4/3/134347303/8518695.pdf
    • http://sdek-24.cc/xiduzefezidativadawe1ttyj.pdf
    • http://piredvizhnik.com/padidatimimawoy27nr.pdf
    • https://cdn.sqhk.co/kepozote/BijjhCh/entry_level_video_editing_jobs_los_angeles.pdf
    • https://lojanoper.weebly.com/uploads/1/3/5/4/135400197/e02c60fead55c.pdf
    • https://cdn.sqhk.co/datolabevev/3hiCgjI/jifelesi.pdf
    • https://cdn.sqhk.co/sixerusesebu/bUjayuC/dungeon_cards_ios.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f52e0f80-81c5-4424-a148-af7af373e20e/breaking_news_in_hindi_today_india_this_time.pdf
    • https://uploads.strikinglycdn.com/files/e2c04c7c-c49c-48d7-b6b4-f24eb0f7274c/20085956083.pdf
    • https://uploads.strikinglycdn.com/files/8f41d92f-7292-41a0-8479-b269afe35a39/78300342420.pdf
    • http://nelozud.epizy.com/73213222041.pdf
    • http://muvabeso.epizy.com/biology_syllabus_for_neet.pdf
    • http://semewefiji.rf.gd/simple_proforma_invoice_template_excel.pdf
    • http://gemixeferakin.rf.gd/pomodoro_technique.pdf
    • http://firiveperoju.epizy.com/vevofigejikebotofisux.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb5b.bin
8319e949a06f2f29eaf36b02240d57589b4548c2ae716a3ba39904d194319f9f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5B 5420 bytes
font_01_sfnt_off0000fdc2.bin
618fafe69ce0f3ff7c787bddb9bb3da0b98043b6a1ee95cbc9adcec0037e1658
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC2 11080 bytes