Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed326953f35625cb…

MALICIOUS

PDF

79.9 KB Created: 2021-09-16 02:27:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b131a0546e5963953c4123910a50b211 SHA-1: 5ebb359698cdf5e2920b93dcc82c02ad7dcd4df6 SHA-256: ed326953f35625cba164cb6b1f804bf650115131bc29bef3be52b200fe128a10
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to potentially disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded content are consistent with attempts to redirect users to external sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://szguilong.com/userfiles/files/lafofanenuboditanole.pdf In PDF document text
    • https://nergizleryapi.com/image/files/61328110883.pdfIn PDF document text
    • http://phongkhamthienhoa.org/images/files/miterawepasotajokokawane.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9f8585898c0ecb3b04e07c6c1fdfceda/39901034769.pdfIn PDF document text
    • http://888spirits.com/userfiles/file/43445473860.pdfIn PDF document text
    • http://infosierra.es/images/editor/66251859974.pdfIn PDF document text
    • https://www.domaine-boussard-chablis.fr/ckfinder/userfiles/files/jabop.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/bawenosaj.pdfIn PDF document text
    • http://historico.uts.edu.co/portal/app/ckfinder/userfiles/files/34965575735.pdfIn PDF document text
    • http://ylpqzl.com/ckfinder/userfiles/files/71545812242.pdfIn PDF document text
    • http://dinhvi5s.com/images/newtech/files/80214156381.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/81477991498.pdfIn PDF document text
    • http://s4l.vn/storage/ckfinder/files/33819442244.pdfIn PDF document text
    • https://mpressivelabels.com.au/application/third_party/ckfinder/userfiles/files/jilufevedeburipovoj.pdfIn PDF document text
    • http://ahjygjg.com/upload_fck/file/2021-9-4/20210904215827540841.pdfIn PDF document text
    • http://www.serenissimaservizi.com/files/19681418244.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/55919272874.pdfIn PDF document text
    • http://maility.pl/_ADRESuserfiles/file/3924919778.pdfIn PDF document text
    • https://elesud.it/img_pagine/file/fovudu.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/67367907700.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/97014388199.pdfIn PDF document text
    • http://nc-israel.ru/upload/files/miwelegipelobaxode.pdfIn PDF document text
    • http://hyundaidongdo3s.com/images/files/39027180109.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/fekulu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=como+desactivar+busqueda+por+voz+androidPDF 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_off0000d24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24C 17960 bytes
SHA-256: d842a8772326828e6af33024d4f86162478dbc27a7c8a5b03c7586e419bcb998
font_01_sfnt_off0000ffcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E2 11172 bytes
SHA-256: 4fb4cc8dc6bbf2678c0373b4f7d5bcd4c2623b2be71ed2c1e6c888ac804d197c