Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f6503079a132bc…

MALICIOUS

PDF

90.8 KB Created: 2021-06-27 23:20:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5251e075e553df9b693b526de37deab4 SHA-1: 777fdf71fbb3ce5c5695031ee42af6289a4a5916 SHA-256: 29f6503079a132bccb8fef701de344fc3e6ac60cbecc8243fbd85bd976044ae6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is classified as malicious due to its structure as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains. The embedded URLs, such as 'https://coretry.ru/uplcv?utm_term=most+creative+swear+words', are likely used to redirect users to malicious content or phishing pages. The ML classifier strongly supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • 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://coretry.ru/uplcv?utm_term=most+creative+swear+words PDF link annotation
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/62e996a65a5a7d62c4e22dd632423db3/82858344770.pdfIn PDF document text
    • http://firegallery.ru/img/upload/44625374068.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/wesanerez.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2e9a17daf---botonopoz.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/9e0b4fd9c9739f29a5446eaac804f176/fiwubigex.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/70262408914.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a142c89e9---17437246141.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/womoved.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/dogafuzosoroxav.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/f5c96684bc8bfdb4781df549872cfdeb/dutobozibepokevaduvirom.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b70f278e0a7---rofowuso.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/kofoponojiwadoborosodefos.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/35791c17e753131bd208ea89ef6bd3ba/duriwogipuziruferibujunu.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/16e799387de5ede0e68acc35bff9bb53/30543544389.pdfIn PDF document text
    • http://jmdfhjl.com/fckeditor/userimages/file/mufikifibejalefovuribawu.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/a75d4ff58e9cab1ecf2d619793670746/18706824638.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160749972d0b46---54149019649.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c65e27d73d6---34892312167.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16071d8792823c---pofuk.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16072e9c8527d5---90461543040.pdfIn PDF document text
    • http://myshopekerala.com/userfiles/file/wajamigifutoxoxusubisix.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/28434759653.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/9c2510828b99d443be3091be17290c97/wujugabupix.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/5g603rs3nb5v282l5c3kvh09h5/71088836919.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_off0000fd95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000115ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AC 10360 bytes
SHA-256: 27efc104f22412b316ad78aa6ff57e0d5ef2616b0cfbf11f69ccb028f602a0d2
font_02_sfnt_off00012d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D51 18356 bytes
SHA-256: b143cc6f23e5b4292700035323756578b9b160b3d88ffa6753d30e34e8a63a2d

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