Malicious PDF — malware analysis report

Static analysis result for SHA-256 68721b3e15cf12c4…

MALICIOUS

PDF

68.8 KB Created: 2021-09-09 16:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3952f0062ed2be6d6b1ed6fcc72d3a78 SHA-1: 94cf4d01227424b658f861660ba6c1657a89326e SHA-256: 68721b3e15cf12c4f981f4b95ac71fdf0d66aa9aae128110dfb940b5408426e1
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, with many distinct hosts and URLs pointing to potentially compromised CMS upload locations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads. No scripts were extracted, but the structure and URL patterns suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://carlaschroyen.com/content_docs/86044595129.pdf In PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/161364b6268139---pumuduboje.pdfIn PDF document text
    • https://gjbuyerbroker.com/userfiles/file/xeviborediwi.pdfIn PDF document text
    • https://dacola.com/upload/files/81475983722.pdfIn PDF document text
    • https://bluza-shop.ru/content/File/50544251706.pdfIn PDF document text
    • https://orsam.org.tr/paketler/ckfinder/dosyalar/files/lunorolosebanitijepuri.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16136cffa1e5a2---9475000416.pdfIn PDF document text
    • https://studiopros.com/userfiles/file/In PDF document text
    • http://culbertsonlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jenevixisole.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16138fe5fd8d2d---garebovanusuzuru.pdfIn PDF document text
    • http://xn--2o2b17g32e8xisqq.com/userData/board/file/38502480197.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16131ca87a36b4---55019804193.pdfIn PDF document text
    • http://eamenfaraz.com/cache/fck_files/file/1378344054.pdfIn PDF document text
    • http://loadcell.vn/Images_upload/files/menofafuriwe.pdfIn PDF document text
    • http://chinajnbt.com/images/upload/File/56352355453.pdfIn PDF document text
    • http://w-w.cn/isee/pfm/cms/uploadfile/fck/file/tepaxedufopurugajexug.pdfIn PDF document text
    • http://dietmoiquangle.com/webroot/img/files/jilagixejidoduxunasumogon.pdfIn PDF document text
    • http://yongchengtech.com/uploads/files/202109080409506261.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/161364b54522e1---viduwutuxepifepelep.pdfIn PDF document text
    • http://restravel.ru/ckfinder/userfiles/files/wibuxisisejikaziji.pdfIn PDF document text
    • http://hanlacsclub.com/ckupload/files/nonewenusotekomuzi.pdfIn PDF document text
    • https://vicareyou.com/userfiles/file/rabavalapupiporurogum.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/b07dd022b151b8230f098d15e1593d52/89356591053.pdfIn PDF document text
    • http://caogenzhiben.com/filespath/files/20210901082328.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=infinity+design+apkPDF 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_off0000b2a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB3 14256 bytes
SHA-256: 3294e728ee61c8849c86f8ad9203f9d4da3f834dbe1b3a087ae8b832cb50721c
font_02_sfnt_off0000edf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF8 10564 bytes
SHA-256: c0e651c79722b766404ec28bbc84038998303391a5fd913e6fbb4d69d24bf4ea

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