Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd117ac94c8d240…

MALICIOUS

PDF

83.9 KB Created: 2021-09-05 03:52:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 614da4995f5b2e5565a460c19eb174d6 SHA-1: 7c27d587f0dffdf63fc50777c1bf5f5fb6a7cbe3 SHA-256: 9dd117ac94c8d240049102036fea9d6bf6c67a7c444cfb24de1bf1bce1305790
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect the user to malicious content, likely leveraging T1059.007 if any JavaScript was present but not explicitly carved.

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://smidgel.ru/uplcv?utm_term=tracheoesophageal+fistula+types+pdf PDF link annotation
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/dbecc4af53cd3b6f707fa6f53435ac7b/42307343820.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/33782073830.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae2535272cb---muzilekazaj.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/25019103574.pdfIn PDF document text
    • http://explosivedevices.ru/media/file/85015641882.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e43a749649---kafigipikinenenusawag.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1282b1f90---semukepisufetarepetiriv.pdfIn PDF document text
    • https://vico-immobilien.com/ckfinder/userfiles/files/16348740889.pdfIn PDF document text
    • https://torgradio.ru/new/files/file/wewuwikaken.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3d9f83022---22583966391.pdfIn PDF document text
    • https://cdmsig.com/ckfinder/userfiles/files/potavijawonebezazeja.pdfIn PDF document text
    • https://mollis.rs//files/birino.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/f6dfe6d3b2eb104cbba00baccb3f095c/89862161261.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160afc6fcf1268---78536013933.pdfIn PDF document text
    • http://kartinatv.org/uploads/files/90448243979.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/xupimoges.pdfIn PDF document text
    • https://laser123.com/geektic/files/pisobuxo.pdfIn PDF document text
    • http://acutecardio.ru/sadm_files/rujesijukitutu.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/79ce84a8476bceae7c8d6d69b8868543/gosazaxidajatogu.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/69196139036.pdfIn PDF document text
    • http://jessicarossitto.com/clients/7/7c/7c16b8c799dae9ffcd1258f31d6ff645/File/tedoferomovo.pdfIn PDF document text
    • http://tele-fonika.pl/upload/file/witibedepogagowif.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_off0000e404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE404 10972 bytes
SHA-256: 2f96350c1531dc588f85a0b30b33f6e411fb2a24794eb34a5458aa2f7cd56289
font_01_sfnt_off0000fd76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD76 17060 bytes
SHA-256: 8c868f610fb99b8ecd4e4a5ae219918406faed3377ff5c00aed177e3d880dfef
font_02_sfnt_off00012993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12993 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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