Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b0d0db00d09a43…

MALICIOUS

PDF

82.3 KB Created: 2021-08-22 03:11:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5d5cd2e306b8ce0cbb9c0bf2d90cc698 SHA-1: 08e631e6821d36a74e5111962a348e96fd9de01b SHA-256: e0b0d0db00d09a43ebdc96e87453ece966395986cbdb48c740ec1f87b65990f9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF containing numerous links to external websites, many of which are hosted on compromised or disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggest the document is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://inwebjor.ru/uplcv?utm_term=linea+del+tiempo+del+internet+pdf PDF link annotation
    • http://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/lumafijorumuporopi.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607077a72d25c---rujitasuf.pdfIn PDF document text
    • http://vencedor.coop/images/admin/file/30171048783.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f19756ac40---wafakavodabokibupire.pdfIn PDF document text
    • http://onroerendgoedindex.nl/images/uploads/salexorov.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/l8ccsd3rjvoi2fiq2i3cqoh2q5/jirakosowovijitidemisup.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/84df2c0e2afbcec728790fbf82939aec/bifurewudopamatikijadaf.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f42d8e9ef---giravipowewulaxova.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/h7v2tvo2fnpfoiimumjea42peu/20366940200.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/93090983672.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/37793438997.pdfIn PDF document text
    • https://aviatroglo.fr/IMG/file/wafufugupefuxodonegoxete.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b28bc20aacd---40784247996.pdfIn PDF document text
    • https://cemb.ca/upload/editor/file/gigix.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099ff89e4232---72021705976.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/novononowexo.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c12ab693912---87103600653.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf1c5d42edd---29818100037.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/garixepu.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/26960575653.pdfIn PDF document text
    • https://aathichudi.org/userfiles/file/70612650114.pdfIn PDF document text
    • http://zonweringbelgie.be/ckfinder/userfiles/files/bebomovuvumaxajusajanat.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_off0000ddf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF9 10448 bytes
SHA-256: 7d2dc2ef5ccd3e978f2518f878ba3fd2c546aecdac9850178283ee0d48946622
font_01_sfnt_off0000f58c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9E 17492 bytes
SHA-256: c60bbfddd1a61415a5352d1dec0390bc5dfcf3d1235c2c83cc6b6bac70b28860

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