Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eead52f7f66a7e8…

MALICIOUS

PDF

67.6 KB Created: 2020-12-23 12:09:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 732ebb3f707218faaf863d052ba44bb0 SHA-1: ef48564735f5d7e2ac2b506631114f4ee291eba9 SHA-256: 8eead52f7f66a7e8ee9d1eabb5ea1a7ad6b8826c2d545d35a8271df1002a9560
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic indicating it is part of a link farm, with numerous external links. One prominent URL, 'https://traffset.ru/strik?utm_term=project+management+institute+membership+verification', is presented as a lure for membership verification, suggesting a phishing attempt. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffset.ru/strik?utm_term=project+management+institute+membership+verification PDF link annotation
    • https://rejudizik.weebly.com/uploads/1/3/4/7/134701546/jexokubamematub.pdfIn PDF document text
    • https://rofotemajanati.weebly.com/uploads/1/3/4/4/134497193/tuzifu.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/wegemebufojafak/wukunikadusun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/380fc866-4fe6-4536-8ca2-424306291a04/psiphon_plus_handler_apk_uptodown.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe12d6b12753a7f033a2be9/t/5fe1c11815fce75a50ec23cf/1608630552968/whatsapp_messenger_apk_tablet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53a3177c-534f-406f-9cb7-3b2e40023229/marlin_model_60_22lr_parts_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/tawegosebanajak.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/fabal.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc51111239b0722914c12ae/t/5fc830f213f8d93bf2fb7256/1606955251093/ninja_run_up_and_download_jio_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/63829985415.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/extent_report_jar_files.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_off0000cadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCADD 5676 bytes
SHA-256: d27c483664ef3ba86d3052c014aa901b180b7caa87289b2d56aa8b7a8ff7ecc8
font_01_sfnt_off0000de0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0F 10416 bytes
SHA-256: 5cbc1ebe53c14ed1d85c47c69c4b28a12c08daea2d5480a3592bfa5202bb4fed

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