Malicious PDF — malware analysis report

Static analysis result for SHA-256 647e4d60e24c6f20…

MALICIOUS

PDF

71.7 KB Created: 2021-09-02 22:19:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f1d64c2077ab83483bb20fd7c613d156 SHA-1: a8406be1cb010879a53558ca8d53d1ee8e18dc19 SHA-256: 647e4d60e24c6f20eb465a96eafa2be266ac5fb75b5c1c2f2d13b5dd9aaa6e79
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. Heuristics indicate it functions as a link farm, with numerous URLs pointing to potentially compromised CMS upload storage and disposable hosting. The embedded URLs likely serve to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/69659801596.pdf In PDF document text
    • http://canadianrockies.ca/files/file/vazoroturupemamate.pdfIn PDF document text
    • https://pasarantogeldua.com/contents//files/36996247056.pdfIn PDF document text
    • http://hocikto.info/userfiles/file/nemuwusuferumopodogifuje.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc6d33913c---tepukitulili.pdfIn PDF document text
    • https://tungqibiotech.com/upfiles/editor/files/gipelumelitanarogaximozu.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160baac4e43147---tuzekaperozowesiredir.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/20613911dea59ff2e4c0d297e82fda74/lusozuledezosapivigomova.pdfIn PDF document text
    • http://mega.kz/media/upload/files/fexakomekibavezifa.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/qn1b0q3o7uslr0gaqaihk939p5/livepoxokagadubomoburibe.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/6847162540.pdfIn PDF document text
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/48990059419.pdfIn PDF document text
    • https://artbynela.com/uploads/file/36404412880.pdfIn PDF document text
    • http://maynenkhipuma.vn/quangbasanpham/app/webroot/upload/image/files/71967252948.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/59464527580.pdfIn PDF document text
    • http://veronikavilla.hu/userfiles/file/91391560601.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1fb9ca0e93---21433649243.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b8ef15562---94614312023.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b0fa9442c6d---gujujoduzugipujifujudid.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160b0909c45ada---sinaduzujetifexadaj.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606c94394c5ab---dukagevuxapog.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160848ef545643---gavefuweluvi.pdfIn PDF document text
    • http://www.ville-dammarie.com/ckfinder/userfiles/files/93610667869.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/76657143623.pdfIn PDF document text
    • http://hotdeals24x7.com/ci/userfiles/files/50759234273.pdfIn PDF document text
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/25794121802.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=cujo+smart+firewall+manualPDF 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_off0000b96c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB96C 10720 bytes
SHA-256: bbbe24cc3ab7834ccfb9f13ca4cc19f0181c5d90b028db8b0a485ef5612e0582
font_01_sfnt_off0000d213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD213 15420 bytes
SHA-256: cf623b54697b20aa4ca70c74c5c60a69a3124cc574f9e95724ee9988c1514af9
font_02_sfnt_off0000f971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF971 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1