Malicious PDF — malware analysis report

Static analysis result for SHA-256 bddf78c36eeb9a19…

MALICIOUS

PDF

80.0 KB Created: 2021-06-27 00:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8b5c04e46f9458ab588077e08f205864 SHA-1: 3f583d3c29d8a7024b3de917c41db4fe5a302cd0 SHA-256: bddf78c36eeb9a19ae70fd5def5ca91f9d282c72cc03853bed5da0dab1b02688
154 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 designed to redirect users. ClamAV detected this as a phishing trojan. The ML classifier also flagged it as malicious. The presence of external URIs and compromised CMS upload links strongly suggests an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7088

Heuristics 5

  • 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
  • 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://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609024d2e20d0---77365308410.pdf In PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608289ffa5da5---62462032812.pdfIn PDF document text
    • http://sibinetweek.ru/userfiles/file/67023211016.pdfIn PDF document text
    • http://japan-railpass.info/images/blog//file/funupalipemavexe.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089452b64761---gigikejawerifiki.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/f8bb0decc7ac5e06a787e82769e8d6b6/dinixajesonunixurodiku.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0f7e5a974---9872313298.pdfIn PDF document text
    • http://lakesideterracecondo.com/clients/41361/File/duxemexuzigetiwivajudu.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/56328037203.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/ffac592dd3b0446ba0c78bcdc03d86a0/bobojebufudinexo.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/kagivusaxo.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/rcci2tnss6hln0j9r3fkcb0ek7/79153744798.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607291e1c1615---welunesebemipuzuxat.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/1ad206f43a30025bbf1e4010e2e30848/15271545336.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/npco79khcjgaq65jpl5us11u34/45263825251.pdfIn PDF document text
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/3d6829b8d8ebc110f7baddcfd2e0533b/jerilixasizi.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/38e8f59b681e31761b6614440e364f04/soripebevema.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/gq3qhhm6nljbk5h6gslkkrfm9f/berinomevu.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3b89edc5e---zasanabejadurafegivixo.pdfIn PDF document text
    • https://sealordhotels.com/ckfinder/userfiles/files/virojabesififefuzagepekik.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/pipurexofi.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/2362e2d0eb9b36093cb6ec07e087ae3c/gugidugadavuxozexiton.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/98b6127f1c1495ca128881e3c8d1daf5/fapoxomenim.pdfIn PDF document text
    • https://lemanssrl.it/file/minimeduwukodiwinivudelok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=local+downlevel+document+printingPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/86ff4b0f82f56bf693d03380356bc38a/vevotorukites.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000feef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEF 10896 bytes
SHA-256: fd164b73f82beeb52694a79f837fe9893c76f4cd2479da38d8b5150556703414
font_01_sfnt_off000117e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E9 18088 bytes
SHA-256: 33a82e587569f42eafa1f6381457eb83e05fbe70a290b35bf285e135fb4cd1a2

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