Malicious PDF — malware analysis report

Static analysis result for SHA-256 5153ab45d379da09…

MALICIOUS

PDF

85.5 KB Created: 2021-09-11 11:54:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 690b9cd74384167505bda743c58a9402 SHA-1: b68e87672cd002ebce060059d52b28d277f12565 SHA-256: 5153ab45d379da09f55dda44154364c07c72ef3c4156123787c6ca8cdd52ef8b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within PDF documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host numerous links, likely to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://daiichigroup.net/uploads/news_file/lavikopevutema.pdf In PDF document text
    • http://georgewongdesign.com/gwd/upload/files/21429390418.pdfIn PDF document text
    • https://fanaf.com/article_ressources/file/84357297558.pdfIn PDF document text
    • https://rockyhotelsgroup.com/uploaded/files/befuwezeketagore.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/161381d3f9c527---78323766222.pdfIn PDF document text
    • http://thessalonikiflights.com/files/files/70534156802.pdfIn PDF document text
    • http://marleenjansen.nl/images/uploadfiles/30397300974.pdfIn PDF document text
    • http://www.ernakulamarchdiocese.org/www/js/ckfinder/userfiles/files/jovubu.pdfIn PDF document text
    • http://glavis.biz/userfiles/file/tixufuvakosolojim.pdfIn PDF document text
    • https://mr-alian.com/upload/ckfinder/files/ximukalet.pdfIn PDF document text
    • https://stmpallet.com/ckfinder/userfiles/files/98228104273.pdfIn PDF document text
    • https://dycmc.com/DATA/upload/files/202109110155527039.pdfIn PDF document text
    • https://reha.bg/content/upload/file/87683050847.pdfIn PDF document text
    • http://hyosangjo.com/userfiles/file/20210907031607.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/wapolozukitalibegiguwutaz.pdfIn PDF document text
    • http://zit-tech.com/userfiles/files/resakoborojirovido.pdfIn PDF document text
    • http://www.asiacoservice.com/file/files/tikipunonawabas.pdfIn PDF document text
    • https://euforbiabulgaria.com/uploads/pages/files/gupovoluta.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/guwuribigevipi.pdfIn PDF document text
    • http://scvumaichiramen.com/uploads/files/pavizukafosinegaxib.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/vamujenaka.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161364222710bf---19730149081.pdfIn PDF document text
    • http://garmaclima.com/uploads/ckfinder/files/18567762352.pdfIn PDF document text
    • http://kite-surf.sk/files/pivalurebedovib.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210902_F745A97218366461.pdfIn PDF document text
    • http://galettedesrois.eu/userfiles/file/66484040458.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=parava+malayalam+full+movie+download+hd+mp4+9xrockersPDF 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_off0000e3d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D3 11592 bytes
SHA-256: 6667f7a93b05474f3d3972460be2fcdbde62705cbcab6098b37017a5770b88bf
font_01_sfnt_off0000ff4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4E 18504 bytes
SHA-256: bd03929d81085fc0fe6c4cafc7bc7c44572921da3c54ef9d7c7cb2c24050595d
font_02_sfnt_off00012f8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1