Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf0c3fe64cd6e8d4…

MALICIOUS

PDF

97.2 KB Created: 2021-06-28 06:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: f54aa830fbcb67eac4f685ecc8bac90e SHA-1: 83a9d7593c5599f4b44b6344b8dfbd680d8c7298 SHA-256: cf0c3fe64cd6e8d4738e135e09fe0ca4df4d7deaab38e1c9ecea71f2e5263730
156 Risk Score

Malware Insights

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

The file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous URLs pointing to compromised WordPress sites, likely intended to manipulate search engine rankings or redirect users to malicious content. The PDF structure itself does not contain readable content, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/j57lutm1d2g1f5urqut4i4k5d5/nowosum.pdf In PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6baee457c---61442780994.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16098ff052b85b---pebozoregerorukidawiva.pdfIn PDF document text
    • https://ntwbearing.com/UserFiles/File/20116943832.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/sikina.pdfIn PDF document text
    • https://bonacorsi.it/file/5364499786.pdfIn PDF document text
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/5ad197dcf44759f87b7036fb998631aa/19934532453.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/ba298c779224932c45bbdd8547458325/bivololivukuridasi.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/addad33634ee8062d529e72d0c5d7c31/jajemowe.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/11pj7h43k08lq10q80la81ebrf/vinirili.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc7fb26011---23435015428.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/8c61010d9a5896634d2ad633e5d2f548/vadibalojidabofunedo.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/d8a82cd9b7f42ade95a03dc8f7a5e805/5573596854.pdfIn PDF document text
    • http://www.serenissimaservizi.com//files/12723095468.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609844a5a5012---68136727310.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/8207i4im0atrah4bo4d3mgdqhm/44249051894.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/732a3bead8535ae210aa7b634e0d21f9/69377643084.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079cb058b551---matuzopulamipalisojoguj.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/im4i4ip9q70oofmr9pr14sln82/nulivamikanajewumozuw.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/2bce1a9130c907e44f8ae5a506f0ed39/zenoloverabimidota.pdfIn PDF document text
    • http://ilovegabal.net/fckeditor/_upload/file/30789788034.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609743b744713---26212673946.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16084a4d1e7a97---pobedibazizukupudanogame.pdfIn PDF document text
    • http://dgjst.com/upfile/file/dezevuda.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=symons+cone+crusher+parts+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_off00011714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11714 10836 bytes
SHA-256: 7ee9d8f27630041e814301a0d484ab3923e9f588223ddd6c67e0fbdc92f59bca
font_01_sfnt_off00012fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000147ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147FF 18080 bytes
SHA-256: 11665f68782c4423fc0f13ce64426e5a3e2f3beb783c30b4aabf8ae7946d6977

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