Malicious PDF — malware analysis report

Static analysis result for SHA-256 93d96ed93d22e2ef…

MALICIOUS

PDF

86.3 KB Created: 2021-08-18 23:31:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: d89968289b9dc2b94ae2a4b56c44bc6f SHA-1: a678f5defa79a72051a574e2b01df1a8d840315f SHA-256: 93d96ed93d22e2ef9d52b86d28c47dbe4550f893dce312010a3482b63de54830
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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 http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9bd2cc31a---28172493651.pdf In PDF document text
    • https://dancleland.com/img/upload/file/mositeretoxuwojitaf.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/38368418834.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/90517190889.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1782d13d4---50676244742.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/vigimiramefitagexasa.pdfIn PDF document text
    • https://transit-connection.com/userfiles/files/gutokupeludaxat.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b2fe39d72c6---vodagapedotomimivezuku.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/46e809281fabc62516257f6cdc76cd67/sinafeviva.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/mamudofawo.pdfIn PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/43577602966.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/pamurigosixipuvas.pdfIn PDF document text
    • http://giasuminhtam.com/Images_upload/files/xuriwufimapige.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/mbr7s3ubbub7cmh69s4daeksli/dison.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/9tkoellrhaegkr3shu81sb4b21/tijolukofekina.pdfIn PDF document text
    • https://happycolaborativo.com/uploads/files/40111846540.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/xawakud.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/630d8e6b84b2d8ceb637b3fa90d31f02/tosixenekefufuzig.pdfIn PDF document text
    • http://covinahigh1980.com/clients/1/14/147ee80f0cf2e08ca1b5067d21485a43/File/73893403996.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/70499502506.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095dc6b5b05d---49559774149.pdfIn PDF document text
    • http://kag.fr/userfiles/file/dimox.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/diginoj.pdfIn PDF document text
    • https://congnghieptauthuyvietnam.vn/upload/files/mixaluwefugi.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/86149036482.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bff00267e9---3510567483.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=the+kissing+booth+castPDF 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_off0000ed9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9D 17388 bytes
SHA-256: 80b3a0d5301ed479c465afe5a18576e293652d9a175f83869fe878c731896858
font_01_sfnt_off00011ad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD7 10556 bytes
SHA-256: 238f3b97fb8e795c86b6729480eb8973aeeffacb66014cfa9693e3463956fd11
font_02_sfnt_off000132ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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