Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d089622232a59e…

MALICIOUS

PDF

69.3 KB Created: 2021-10-01 01:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 275d17b1ae503443881d219a45aeca3b SHA-1: 2bce05d348138b3fa63781cbeae76218aaecf198 SHA-256: e7d089622232a59e85db230d51850ce3c2fa80b59793b6a3a901e955e2ddc3cc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The PDF contains numerous embedded URLs pointing to other PDF files hosted on various domains, suggesting a link farm designed to obscure the final destination or distribute further malicious content. While no scripts were explicitly extracted, the PDF structure and the presence of many external links are indicative of malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://cabanagarden.hu/editor_up/39724367029.pdf In PDF document text
    • http://podiummoda.ru/userfiles/file/47462956066.pdfIn PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/xinafagefejitisusebelesa.pdfIn PDF document text
    • https://karate2.cdmedia.pl/userfiles/file/86379056919.pdfIn PDF document text
    • https://www.kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/vafez.pdfIn PDF document text
    • http://gelateriacool.it/userfiles/files/giziwitilix.pdfIn PDF document text
    • http://www.diplomat2014.ru/ckfinder/userfiles/files/fuxuwefizegu.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/rasuzovolebosufomuloneg.pdfIn PDF document text
    • http://canadianrockies.ca/files/file/85885853160.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/622331850.pdfIn PDF document text
    • http://novafish.it/userfiles/files/37760734517.pdfIn PDF document text
    • http://cgpreceptor.com/ckfinder/userfiles/files/17800462687.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/fexitabaxid.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/14647600187.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/gefeboxavares.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161492b9e756de---53455999741.pdfIn PDF document text
    • http://cocoal.com/uploads/file/gakinilapu.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/5361336207.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/6211577187.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/65572926393.pdfIn PDF document text
    • https://servingltda.com/userfiles/file/dapijuzunibo.pdfIn PDF document text
    • https://dp-silver.com/userfiles/file/wevarega.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/f3652d8d8b404cc44c01f830b7ef21ae/24062729922.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/jokokotuvuvuwibo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=happy+birthday+gif+funny+catPDF 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_off0000aea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA3 15396 bytes
SHA-256: fbf6c16a81b6346e3c63b2fe93483dfd0bbe6b79d9dd82434b495e7b432bb747
font_01_sfnt_off0000d5e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E1 10776 bytes
SHA-256: c60d3a6a1f377873f65fed621178e6cce47f8ecb9d57d4f805fb7e05a87bff2a
font_02_sfnt_off0000ee2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1