Malicious PDF — malware analysis report

Static analysis result for SHA-256 84947759bbeda6e6…

MALICIOUS

PDF

74.3 KB Created: 2021-09-22 11:23:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: aa96a708d144ed1e38f2963dd2dbd0a9 SHA-1: 5ffb926233c9a7a761bc9688458b34643e7371dc SHA-256: 84947759bbeda6e61c608cf14bca11f4dc02e826754f0f82d4144b1a0d4a4cb7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, with a high heuristic score indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to phishing sites or download further malware. No scripts were extracted, but the PDF structure itself is the attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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 https://razredna-nastava.net/files/bajabugogalotugasonenela.pdf In PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16146d39f70a2e---6521457869.pdfIn PDF document text
    • http://cmuniontravel.com/userfiles/files/91711706493.pdfIn PDF document text
    • http://gonzagafood.com/userfiles/files/22531553738.pdfIn PDF document text
    • http://atya.eu/files/file/rekitunimagi.pdfIn PDF document text
    • https://ipssecurityconsultants.com/ckfinder/userfiles/files/33016377732.pdfIn PDF document text
    • http://branonperformance.com/ckfinder/userfiles/files/liladibijojiriboxa.pdfIn PDF document text
    • http://delfosventures.eu/userfiles/files/pakufupeda.pdfIn PDF document text
    • http://mayphatdienngocquang.com/media/ftp/file/givejisovurojumixowameve.pdfIn PDF document text
    • http://savitaco.com/uploads/images/files/28753421885.pdfIn PDF document text
    • https://svltv.in/userfiles/files/rowifazo.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/vuwuvu.pdfIn PDF document text
    • http://bkdesign.ee/userfiles/file/xasifujizixoginopev.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/wasepaxivesani.pdfIn PDF document text
    • https://confidence-ist.mktechsol.com/ckfinder/userfiles/files/romawikalotedux.pdfIn PDF document text
    • http://jingmingtai.com/filespath/files/20210916041018.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/dadufowevid.pdfIn PDF document text
    • http://reginahajo.hu/_user/file/kusulifitafomidun.pdfIn PDF document text
    • https://rpaxis.net/userfiles/file/welakerexiko.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/161493eab7cdb2---xodoso.pdfIn PDF document text
    • http://fatimaartwork.com/userfiles/file/48539040675.pdfIn PDF document text
    • http://keralatravelpath.com/uploads/file/55824314499.pdfIn PDF document text
    • http://eyela.kr/uploadfile/fckeditor/file/naragiwatosawoxe.pdfIn PDF document text
    • https://konchris.com/userfiles/file/1631357970.pdfIn PDF document text
    • http://mirutte.com/newsfiles/files/jaxukuwasov.pdfIn PDF document text
    • http://kahsport.cz/userfiles/file/53503816141.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+download+android+auto+appPDF 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_off0000c1a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1A6 10264 bytes
SHA-256: 5c9f0ed1b6f0a723bdff7b54bb243e0efb1361ed7922622e613b1b05570ea70f
font_01_sfnt_off0000d8c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C5 16832 bytes
SHA-256: 9fed5e257f359c099d4c85719cc15447154ef12931950da6a08ebd4c7920f546
font_02_sfnt_off00010390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10390 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.