Malicious PDF — malware analysis report

Static analysis result for SHA-256 2376240408bf70b8…

MALICIOUS

PDF

164.9 KB Created: 2021-10-06 03:05:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 128a43f23b5de339f95e00ba6380fc3e SHA-1: df66097cf984d8dbe48d2d4477b026fb6b90e828 SHA-256: 2376240408bf70b81d8f83f668206839852d215f85d2c7fdbd82fbc139ecded6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous embedded URLs, many pointing to disposable hosting, strongly suggests a phishing or malware distribution campaign. The ML classifier also returned a high confidence score for maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://oniceh.ru/uplcv?utm_term=chance+the+rapper+high+school PDF link annotation
    • https://ariconium.cz/webpagebuilder/ckfinder/userfiles/files/xuduriviwiv.pdfIn PDF document text
    • http://retrievers.su/ckfinder/userfiles/files/3769874558.pdfIn PDF document text
    • http://kiuanai.com/userfiles/file/jagubexomonige.pdfIn PDF document text
    • https://pesonabali.dswip.com/ci/userfiles/files/sarutinorujosesobivo.pdfIn PDF document text
    • https://henseltech.cz/userfiles/file/demujekeraruxe.pdfIn PDF document text
    • http://leoclubmarsala.it/userfiles/files/seliloxomowesexofajuze.pdfIn PDF document text
    • http://fredericjean.net/oplusco/file/63050513854.pdfIn PDF document text
    • https://fizjolech.pl/userfiles/file/vuzulanaj.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202109252326178506.pdfIn PDF document text
    • http://fotosvatba.net/userfiles/file/94128858420.pdfIn PDF document text
    • http://www.companyforte.com/imagenes/editor/file/rorefoso.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16158005924e3c---sidifafasavilidimewepurub.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/fubixokizivu.pdfIn PDF document text
    • https://kueapem.com/contents/files/xojixerawowivuze.pdfIn PDF document text
    • http://www.agot.pl/upload/file/37729279646.pdfIn PDF document text
    • http://5thaveseniors.org/userfiles/file/fegarojevuguz.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b748b6ac60---79764616047.pdfIn PDF document text
    • https://cope.lk/assets/media/file/55148899009.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/11493892281.pdfIn PDF document text
    • http://federicozucchettiarchitetto.eu/userfiles/files/94076585990.pdfIn PDF document text
    • http://sreema.org/FCKeditor/file/lovonutej.pdfIn PDF document text
    • http://frutapac.es/ckfinder/userfiles/files/bufijufugiti.pdfIn PDF document text
    • https://mywayrtk.com/userfiles/file/duvixuwewiledenovodulad.pdfIn PDF document text
    • http://perfectprojects.ro/userfiles/file/jibedididizufarafunigef.pdfIn PDF document text
    • http://bancodevida.com/bancodevida/admin/images/image/file/pedamutinezixokotes.pdfIn PDF document text
    • 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_off00021b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21B0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002331c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2331C 22236 bytes
SHA-256: cd2927fd382b9d2deaf6c9a05fefc4621f0ae545dde4c78bbfc81a7ab6883c35
font_02_sfnt_off00026cee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26CEE 10684 bytes
SHA-256: e77a2c9629d1711c54eabafe625a694c46384274d0295bd77103b1a682d07271

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