Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e0d518caf7e6c0…

MALICIOUS

PDF

85.8 KB Created: 2021-09-11 21:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 62c459307b2e162ebead20862cf05bbb SHA-1: 3d51e48df88908d052ca4f2186ab05939bfea0fd SHA-256: 46e0d518caf7e6c0c5769b7a539fe8a7d43dcddaa63cac7158a17bbda9c6f307
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing operation. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://studiopiergentili.it/userfiles/files/muwoborenufuwuriparedoro.pdf In PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/57277292428.pdfIn PDF document text
    • http://vrieshorst.nl/images/uploads/file/bituwuzikokusexuxiluxu.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/161317ead07b78---9148674325.pdfIn PDF document text
    • https://www.agencesramos.com/ckfinder/userfiles/files/puzijubusobividalu.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/72354034113.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/48273687841.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/966ed1af2b07bc4475ab50d625de1557/nugopevawokurape.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/4960348719.pdfIn PDF document text
    • http://stonepigments.com/userfiles/file/jinozokasawubutezipemeti.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/guwuwetewoxafovemoro.pdfIn PDF document text
    • https://khanoomhoteli.com/basefile/khanoomhotelicom/files/59604625905.pdfIn PDF document text
    • http://idealhca.com/admin/images/file/jipumebibuvibotaxikadiga.pdfIn PDF document text
    • http://degeninhotel.ru/admin/ckfinder/userfiles/files/65711010774.pdfIn PDF document text
    • http://one9five.com/userfiles/files/94636135834.pdfIn PDF document text
    • https://esperanzadeavila.com/fotos/file/97791955188.pdfIn PDF document text
    • http://tlumacz-francuskiego.pl/userfiles/file/pusiwudodinexovapakekis.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/kodupolajogasawobuz.pdfIn PDF document text
    • http://bradzo-ep.com/uploads/files/kasitepixijezasitupewij.pdfIn PDF document text
    • http://eaas-journal.org/survey/userfiles/files/lotezixesafumatirefudo.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/zodefifegitipipi.pdfIn PDF document text
    • https://mp2020.csysadmin.com/ckfinder/userfiles/files/35051928062.pdfIn PDF document text
    • http://air-separation-supplier.com/d/files/80737070430.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=after+we+collided+stream+onlinePDF 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_off0000eac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D7 10704 bytes
SHA-256: 0f89d2dea72baab3193b07790b590b6f2048216ae614e9f3296577e6f53c76f9
font_02_sfnt_off00011b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B76 17740 bytes
SHA-256: e5b85ed7fb1a65ce93de9beb633bc24cec141a636587db771c23b4668e9ebf99