Malicious PDF — malware analysis report

Static analysis result for SHA-256 61c9e57475c08d95…

MALICIOUS

PDF

81.1 KB Created: 2021-02-19 05:40:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 4e2009bd41a15e6e529ab570b6d9a3e4 SHA-1: edda03f1dbbdfc2c2b6d4093f69991460b49e445 SHA-256: 61c9e57475c08d9587b33974399041ddaf4939afbf47d40c96e270666a68a72b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on suspicious domains and are likely part of a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to lead users to compromised or malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/strik?utm_term=the+other+side+of+heaven+movie+watch+online PDF link annotation
    • https://cdn.sqhk.co/jememobak/anibjdk/fojugiminegoxet.pdfIn PDF document text
    • https://liwotagavujid.weebly.com/uploads/1/3/5/9/135961529/gadisivewemo_gukekupanu.pdfIn PDF document text
    • https://cdn.sqhk.co/kupejabel/qigHkic/college_football_national_championship_2020_date_and_time.pdfIn PDF document text
    • https://cdn.sqhk.co/ratugetaj/EahasDH/glow_hockey_2_pro_apk.pdfIn PDF document text
    • http://pojezer.iblogger.org/xureb.pdfIn PDF document text
    • https://cdn.sqhk.co/muvotugi/T9zighj/lidovevabovabifavorapav.pdfIn PDF document text
    • https://fogojokiverowur.weebly.com/uploads/1/3/0/9/130969702/3808475.pdfIn PDF document text
    • https://cdn.sqhk.co/nivodoruw/gjjghaF/space_crew_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/bovutolomevo/gKhccgf/28974429155.pdfIn PDF document text
    • https://cdn.sqhk.co/xisofofumew/hdTIF9B/kolapen.pdfIn PDF document text
    • https://cdn.sqhk.co/rolidofajug/epyrhjh/jugenonixoguzet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fajixe/21308480197.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/spray_de_calendula.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/26483621282.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/meaning_of_balance_sheet_and_its_importance.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/hollywood_movies_free_websites_in_india.pdfIn PDF document text
    • http://fudewalazakukug.epizy.com/equifax_web_email_dispute_form.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF350 5148 bytes
SHA-256: 6195104040704821213babd0c9f7c931be8398ef9e70b40d479548fcbb10917c
font_01_sfnt_off000104b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B5 10852 bytes
SHA-256: 73bde72f0b9bf11fee588d8b793dc0d2eeda1caeb12d4a81db2bd6b18b6dfb82
font_02_sfnt_off00012963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12963 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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