Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b2b88765472486…

MALICIOUS

PDF

84.2 KB Created: 2021-09-23 15:28:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 32eb7f95bf3ab72499176f8bd53b09d0 SHA-1: 98190ab6e74e96bddbffa82efeee6460188e8a96 SHA-256: 96b2b88765472486fa9ac360537c2d0cf5c59e8ec7a9ae2ee354f215d623aa18
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, many of which point to potentially untrusted domains, suggesting a link farm or phishing lure. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the idea that the document is designed to redirect users to various external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://jpt.mysmartedu.com/uploadimages/files/pixotolanewamu.pdf In PDF document text
    • http://stefanourso.com/public/userfiles/file/96792517856.pdfIn PDF document text
    • https://cmfnepal.org/userfiles/files/55109006748.pdfIn PDF document text
    • http://melabo.com/upload/files/tadunapafuvax.pdfIn PDF document text
    • http://elfuklid.cz/foto/Image/file/venutimabaxenetijevi.pdfIn PDF document text
    • https://liho.cz/UserFiles/File/7708176116.pdfIn PDF document text
    • https://taumed.kz/upload/2021/09files/210905045530406019gcyzm.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/161430839cf5ae---10772828252.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/goravulugilojetoposimogi.pdfIn PDF document text
    • http://flexinform.com/hirlevel/file/bukufexavefixon.pdfIn PDF document text
    • http://kutscher-customs.de/gfx/userfiles/files/mupamuvozaja.pdfIn PDF document text
    • http://erulingua.hu/uploads/content_files/files/rupesilakuwunub.pdfIn PDF document text
    • http://bursaceyizgelinlik.com/images_upload/files/marudodameladuwise.pdfIn PDF document text
    • https://artesapanaderia.xyz/aym_image/files/38751133861.pdfIn PDF document text
    • http://www.hgekc.com/media/userfiles/file/17999024945.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1614b0f8e03288---xafudipufajoj.pdfIn PDF document text
    • http://nitecoreromania.ro/files/file/9584844263.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/47674657771.pdfIn PDF document text
    • https://hobbes-group.com/upload/files/sizimexa.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/moximit.pdfIn PDF document text
    • http://ashole.hu/UserFiles/File/90126426486.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/39565933389.pdfIn PDF document text
    • http://candientushinko.com/images/file/39080830501.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=ps5+remote+play+apkPDF 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_off0000dfb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C4 19596 bytes
SHA-256: 1d4080d24f13dc8924f6598ca134792cd320bdd0e1488086d5cd9fe541a34f72
font_02_sfnt_off00012afe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AFE 10556 bytes
SHA-256: 6d228276326c1de2f541e715ad68e9ce72ad80a1d57eaff32e933cf99a474bd7

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