Malicious PDF — malware analysis report

Static analysis result for SHA-256 fed8b03725a4640a…

MALICIOUS

PDF

86.8 KB Created: 2021-09-19 21:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fdc66e6fdc9ecab215d5d7d5cf51cbcd SHA-1: ce52f0dac2a891a86164610d1dccabc29cd98b22 SHA-256: fed8b03725a4640a2f26c1aa6f8644c4202e0be4f8c8c04539a9fd70652cad2c
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating malicious intent. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic suggests the document instructs the user to copy and paste content into a shell, a common technique for executing malicious commands. The numerous embedded URLs likely serve as downloaders or redirectors for further stages of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pixomot.ru/uplcv?utm_term=aktualizacja+android+huawei+p9+lite PDF link annotation
    • http://onmamtour.com/FileData/ckfinder/files/20210901_1A7A1D48BF3F2FC9.pdfIn PDF document text
    • http://scro.ru/pic/file/14452268007.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/dopefade.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614342c2d5e40---baxenokob.pdfIn PDF document text
    • http://airmon.hu/images/files/70957075396.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/84936679215.pdfIn PDF document text
    • https://www.tcf.gov.tr/ckfinder/userfiles/files/nipijupodeguxubitukoweku.pdfIn PDF document text
    • http://www.enfersalus.com/ckfinder/userfiles/files/61014468771.pdfIn PDF document text
    • http://zhouzhuank.com/v15/Upload/file/202198444156038.pdfIn PDF document text
    • https://vonia.mikludava.lt/images/files/29446995063.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/31039485033.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613464fd0a4c2---vovarividigurenobaz.pdfIn PDF document text
    • http://apismorava.eu/docs/lupekut.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/weponetitilirimajasufuri.pdfIn PDF document text
    • https://shibbirs.com/media/files/foxemukalokogowokidesakot.pdfIn PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/jaxojow.pdfIn PDF document text
    • http://estatepie.com/files/userfiles/file/16387975719.pdfIn PDF document text
    • http://seamacros.com/upload/file/42552796738.pdfIn PDF document text
    • http://labsshop.com/d/files/18011821342.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/2167527758.pdfIn PDF document text
    • https://ventadeterrenosurbanos.com/userfiles/file/30081922965.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE983 19272 bytes
SHA-256: 43109625872c63d6e7debeab2c1190afa3175d23e43e224b48a3f6d034c8d06e
font_01_sfnt_off00011bea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEA 11060 bytes
SHA-256: 29cf750504202694b824f8eb5944be7116253a01a77969544e4fae691f2fcd00
font_02_sfnt_off000135af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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