Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b956d602c326d40…

MALICIOUS

PDF

94.7 KB Created: 2021-07-13 04:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: de9b940c27a10c8e2455bfba14b4d47f SHA-1: d118826d059f3122ac31d73f1719b6b9ef89eeb6 SHA-256: 6b956d602c326d40c6f0b659db33ce2a4acb69f8b039afd9ccd5e0b6e6899609
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it's designed to redirect users to malicious content. The presence of these link farms indicates an attempt to distribute phishing lures or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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 https://archism.ru/uplcv?utm_term=mandalorian+vostfr+streaming PDF link annotation
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/lkg8n6ca74cfdm2fp9knlcmum5/78924181152.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608667409ec38---loguvelasuluwapiwomexosol.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3ef6366b6---mozajovewifiv.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f478d3c3d---51411887424.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/s168082b6vcnlmbiiqtgv3ka02/67945595686.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/93430681451.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/7qgmtelj9u5f01ijqcm5tcr4n1/58059690130.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/cac37c33069765bd4bb015b8abd11440/25136669954.pdfIn PDF document text
    • https://noddy.nu/images/file/zinemosuwox.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/5863ab91582115237bbb1837c3d68b52/37086336318.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/monudatidunopudumavavusa.pdfIn PDF document text
    • http://language-coach.pl/uploads/files/92590568209.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160772ede14ee0---misonomozebijujedatugezag.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092f63d227a0---32109826145.pdfIn PDF document text
    • https://windsbs.biz/files/file/lesapuvim.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1606d215ba4aeb---sapepofovigoz.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/05e3b8eb772c50462c5487d0258c2ccf/70666019475.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/buser.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/o84i6o14fun8775ujsu7sp58fg/88778972954.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a1dcb9024---vosemawoki.pdfIn PDF document text
    • http://eraucheta.ru/uploads/file/vinaxeropolita.pdfIn PDF document text
    • http://edgecs.net/documents/wosukomegojepu.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffdbe08e1c---56311315593.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/8f5662rg87jdjdat6dvdeb4fpd/wixozobixedizisimojap.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_off00010d27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12539 18912 bytes
SHA-256: 0e8f8bb8992f153e616b89ad67bbd255c51af9e1b0b839b2f409d4852dc015d3
font_02_sfnt_off00015523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15523 10756 bytes
SHA-256: 256e6185ff9fcd626de372e14bc9a05567b4c4635f264d9db82fb85d18e3acf3