Malicious PDF — malware analysis report

Static analysis result for SHA-256 68c326f796eabc1e…

MALICIOUS

PDF

84.4 KB Created: 2021-08-15 13:21:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3f1183ae1a44e4091e3cb3cd31d95ee0 SHA-1: d31f43d5a84d94c499f2df7177077664ef0ae52e SHA-256: 68c326f796eabc1e7a0a27a2242b67fed9e28179f5a8c76f58083a2c9a260369
96 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm or SEO poisoning attempt. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the structure and URL distribution suggest the document is designed to lure users to potentially malicious or manipulated content hosted on compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/svr5mh852memd0oebvbmv7fv5h/mepewexumanorixifokodor.pdf In PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/5t48kqq4unnsckogcvrimuiuu3/latete.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1610e434b0a50d---33818365657.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/19cf281a0c1b2afeb7563dec06d09c0f/darosapubevulavoxalo.pdfIn PDF document text
    • http://superlitefan.com/uploads/files/11718692793.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/r2esbjntc5hv0ln110h2d1uvt1/56648668302.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/96015464675.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/2bf0a6cbe27ab2b5f6d98de237ad9a27/tisobatasubutax.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160c94eb4e625e---99761118149.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/81950320597.pdfIn PDF document text
    • http://mvclassof1990.com/clients/8/8c/8ca0ba2c7a07c5cd1f21f9fc323c16c5/File/zamafazep.pdfIn PDF document text
    • http://yeosingol.com/FileData/ckfinder/files/20210801_1F7A6026B5F4A7D4.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/195f8f3a226763fcf97084d09f5387c1/nosakolerogebuw.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/t76k6jsaqau4j6ku2gr350p3g5/tufibimow.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/pomibenowavelonin.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a638e13c6a5---kifadotofavanigalizuzagu.pdfIn PDF document text
    • http://radio-salsa.com/php/rs/filesupload/file/xolunifogojavunepaziniro.pdfIn PDF document text
    • http://stromzeleny.cz/file/finerozepexosigeli.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/37735759434.pdfIn PDF document text
    • http://xoblates.com/clients/e/e0/e08cfb93fb97b00c28394d0532709dc9/File/pepufinajotikaziniz.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/25797102340.pdfIn PDF document text
    • http://dichvugiayphep.biz/upload/ck/files/sozododir.pdfIn PDF document text
    • http://salinahighschool1968.com/clients/3/33/33fcb9b832a528c934b1ac42c6b88a99/File/gugenipikopenedazuxol.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/02303d575aca9f7965ce75c3d4929a46/94112983050.pdfIn PDF document text
    • http://studiotecnicolari.it/userfiles/files/remuvewuruvesepixakal.pdfIn PDF document text
    • http://luingpyrex.cz/foto/Image/file/borobadepedixaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=2013+polaris+ranger+500+efi+service+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_off0000e2fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FE 17196 bytes
SHA-256: 20323c6364a20060055ca91b07b72344c1025d286240509b5f7fec81b9b8e87d
font_01_sfnt_off00010fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000127fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127FC 11396 bytes
SHA-256: 0c59063b0f7d02c83c8fdfcfaf79cfb12e9e1434ad80811934c805499ebfa8ba

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