Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b3b14e14862c1f5…

MALICIOUS

PDF

69.8 KB Created: 2021-10-01 11:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 9dcfd47f64f8ccb562b617cd1039b529 SHA-1: 70ad2cde349c6bb5eb4cb02ccfb4c5c89bcfd222 SHA-256: 1b3b14e14862c1f52af13731fbd443abbd5c5098a403ea68f11200c3fd26fb9a
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. The PDF contains numerous embedded URLs, many of which point to suspicious domains and are likely used to redirect users to phishing or malware hosting sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a deliberate attempt to create a link farm for SEO manipulation or to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161517d156cbd3---3789551236.pdf In PDF document text
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/50141898313.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/nuxefameteletapoxegol.pdfIn PDF document text
    • https://sharedsynergy.com/userfiles/file/noxutanawatimab.pdfIn PDF document text
    • http://express-service-auto.fr/ckeditor/ckfinder/userfiles/files/78416339129.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/keposikemabu.pdfIn PDF document text
    • https://gencerenerji.com/resimler/files/fiwikuxezaxunojunewimefu.pdfIn PDF document text
    • http://piqiso.ru/userfiles/file/51096059508.pdfIn PDF document text
    • https://essaidafm.com/uploads/FCK_files/file/63918625757.pdfIn PDF document text
    • http://jinwoosmc.com/userfiles/file/22515334652.pdfIn PDF document text
    • https://searchkar.com/ci/userfiles/files/zadekep.pdfIn PDF document text
    • https://www.bnbtravels.com/ckfinder/userfiles/files/66957401606.pdfIn PDF document text
    • http://hamlineparkplaza.com/assets/amund/ckfinder/userfiles/files/91928345779.pdfIn PDF document text
    • http://xn--q20b13r9leepaeb.net/upload/file/202109202014501166.pdfIn PDF document text
    • https://hilanguage-com-tw.triangle-design.com/files/sejig.pdfIn PDF document text
    • http://smeeing.com/userfiles/files/33653117342.pdfIn PDF document text
    • http://groupementpecheduloir.com/ckfinder/userfiles/files/39237567033.pdfIn PDF document text
    • https://pointwebhost.com/calisma2/files/uploads/satoxosogokenofumerim.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/jarulef.pdfIn PDF document text
    • http://glassick.com/userfiles/file/1057116960.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/benenilodizomejakodekupuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=cartoon+network+shows+in+tamilPDF 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_off0000af47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC759 16676 bytes
SHA-256: f6a93c0b98fa3677c1837dd71500f4f37158557e4d4cd5220651f0848ad69b42
font_02_sfnt_off0000f1d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D3 10584 bytes
SHA-256: 610e13820e53178257a1a668bc3d1b71564d5e7b060222d3b6782c139e617d29

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