Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0dec90037ed589…

MALICIOUS

PDF

89.6 KB Created: 2021-09-09 14:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ec5e884da80b35ee3cc4e74846e92b8f SHA-1: b000351cd44b203cb1b71557f7fd371c8f9f7527 SHA-256: 2f0dec90037ed589190ae27bc484c581009e2c3e24a2f5e74b55defa5511324c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to disposable hosting domains and are presented in a link farm configuration. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 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://livredart.com/ckfinder/userfiles/files/toxijevulizutadukaxi.pdf In PDF document text
    • https://petala.gr/userfiles/file/14951402570.pdfIn PDF document text
    • http://zssadkowice.pl/pliki/15543291593.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/ketebitimalabagof.pdfIn PDF document text
    • http://montex.pro/uploads/userfiles/file/46180994209.pdfIn PDF document text
    • http://thaifilmind.com/UserFiles/file/vizofozifal.pdfIn PDF document text
    • https://thaibamboorestaurant.ca/phpsites/bard_ford/uploads/file/92998450317.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613878954222c---93160128628.pdfIn PDF document text
    • https://spa-salon.ru/ckfinder/userfiles/files/61137877803.pdfIn PDF document text
    • https://dehayemek.net/upload/ckfinder/files/jodijoxupoxosaj.pdfIn PDF document text
    • https://milliondollardesiclub.com/upload_files/featured/files/54860017802.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/2021962325325013.pdfIn PDF document text
    • http://www.satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/67097047832.pdfIn PDF document text
    • http://ambvetfanini.eu/userfiles/files/mamuxor.pdfIn PDF document text
    • http://dsagco.com/Upload/file/30455957098.pdfIn PDF document text
    • http://huh.hu/UserFiles/File/46146804128.pdfIn PDF document text
    • http://lanaecoloridabruzzo.it/userfiles/file/rimib.pdfIn PDF document text
    • http://stickerbarcode.com/file_media/file_image/file/baxewowun.pdfIn PDF document text
    • http://kaithompson.com/userfiles/file/taxakorogozunuwigumumalu.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/73889887365.pdfIn PDF document text
    • http://storemisr.com/uploads/files/6983212957.pdfIn PDF document text
    • https://nabil-doukali.com/userfiles/file/34900829845.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/716da5c89ec2e1cdb4f63ab548c281de/96380258460.pdfIn PDF document text
    • https://dveropolis.ru/upload_picture/vesivusepoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=pokemon+alpha+sapphire+rom+download+citraPDF link annotation
    • 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_off0000f172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF172 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10989 10956 bytes
SHA-256: 210aa7789a74a1f51fef1bc0df8cf66b3d5efaa7247821ccbaa2ee805305f9da
font_02_sfnt_off000122ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122CA 20456 bytes
SHA-256: f3d782c7e1467ec8eefed7b8c2821a55da5ff648f221d5011fb886c74e950fc9