Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d075412eb30a0c7…

MALICIOUS

PDF

83.9 KB Created: 2021-09-19 15:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8f716f8cdaa110ed17bc424b4c38b1fb SHA-1: 63374bf83cb4e831ae9512dc0173a52a139cc6f1 SHA-256: 0d075412eb30a0c79384fda21b1f1169fb915437dad26c2fb46c7b839ecc4f4d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 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://wastran.ru/uplcv?utm_term=monster+legends+apk+mod+unlimited+gems PDF link annotation
    • https://tidurmalam.com/contents/files/dosimereradixosimaxigibu.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/51780811551.pdfIn PDF document text
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/71690934811.pdfIn PDF document text
    • https://navliecky.net/userfiles/file/tugewowetuvudobufugigewi.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/30031895737.pdfIn PDF document text
    • https://owop.challengersports.com/userfiles/files/topesopezasivemijavefoli.pdfIn PDF document text
    • https://razredna-nastava.net/files/82727428827.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614282b764986---ladimuparufagimupuzibu.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/vewotobolufexigu.pdfIn PDF document text
    • http://spartaksedlec.cz/spartaksedlec/userfiles/file/24221891.pdfIn PDF document text
    • http://cp-tournament.org/ckfinder/userfiles/files/92151736700.pdfIn PDF document text
    • https://medgal.pl/admin/ckfinder/userfiles/files/52745176473.pdfIn PDF document text
    • https://protrialse.eu/files/files/pofazolixalomin.pdfIn PDF document text
    • http://studiotrusso.it/userfiles/files/62823771020.pdfIn PDF document text
    • http://architettoannalisatinelli.it/userfiles/files/33667304794.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/76138113682.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/2e5c01a3dc2be57114e178fd0c141045/15570706644.pdfIn PDF document text
    • http://closehorses.com/userfiles/file/66870835297.pdfIn PDF document text
    • https://mkart.it/uploads/file/tisukibesonutifepa.pdfIn PDF document text
    • http://normel.org/files/upload/file/29607215814.pdfIn PDF document text
    • http://101-games.ru/images/uploads/files/buwet.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_off0000ddd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD4 10920 bytes
SHA-256: c0a913ad91232f57d9c464f5800a516c191c0a377aa61f73dfdbf2e5a7014446
font_01_sfnt_off0000f6e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010efa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFA 19756 bytes
SHA-256: fb05418a2fd1947bed48387cfefda9a9899b8fb471b8b17dc9810bc472b59bdb

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