Malicious PDF — malware analysis report

Static analysis result for SHA-256 e707de933e558a46…

MALICIOUS

PDF

83.8 KB Created: 2021-08-27 16:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1bd3cea3bf3d7f109cd412a048b86f09 SHA-1: cc8148ff802fc0a074385d1cc65afd527d9a37e9 SHA-256: e707de933e558a46fa6b1b6b9b4cd94e128fee892f318fe192ce69def9c5534f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links to external websites, many hosted on compromised or disposable domains, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2eccdd338---40120467386.pdf In PDF document text
    • https://aymfly.com/aym_image/files/25717937911.pdfIn PDF document text
    • http://ceramicaartisticamarsalese.it/userfiles/files/gezukuzolulidiw.pdfIn PDF document text
    • http://tutaylamhet.com/storage/ckfinder/files/97624693788.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6cefed99c---27813928755.pdfIn PDF document text
    • http://autofactory-jin.com/js/upload/files/94744560065.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16086fc4a49ecc---79546541433.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/73529055495.pdfIn PDF document text
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/69032026933.pdfIn PDF document text
    • http://hillcresthigh1971.com/clients/9/9f/9fbf9047a6869172a982db6f42f05a9a/File/33342267635.pdfIn PDF document text
    • http://campingwithconvenience.com/files/files/11295789823.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/nk6b1pmk3m6gmn34r77f67jb80/likinulanimonigaduravex.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/telamalixusux.pdfIn PDF document text
    • http://gasnguyenanhst.com/js/ckfinder/userfiles/files/54399028654.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c91f99847---27370142602.pdfIn PDF document text
    • http://jornalespacoaberto.com/app/webroot/datafiles/editor/files/533740832.pdfIn PDF document text
    • http://www.ferm-matic.fr/upload/file/72067670840.pdfIn PDF document text
    • http://didula.com/img/file/luwoselupunifigufa.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/jesudewipulazixetenifasez.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/gemefov.pdfIn PDF document text
    • http://sowa-architekci.pl/userfiles/files/52710550726.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609af7bcb44e1---mifovunafuriseju.pdfIn PDF document text
    • http://cyuanmei.com/userfiles/file/3263898593.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/faputuwev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=general+job+interview+questions+and+answers+pdfPDF 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_off0000e14d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14D 17768 bytes
SHA-256: 631673570ef91e9edb0af8e796741a302f198108cfcd620092069a59e16b3912
font_01_sfnt_off00010f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F56 11196 bytes
SHA-256: 7d0bc91ff33f74796e99efbeaed04b139892a6dfce90b02a0d8a357f63399089
font_02_sfnt_off00012946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12946 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1