Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6b65527e1c3b482…

MALICIOUS

PDF

68.6 KB Created: 2021-07-21 12:02:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c895b78ffb5a8c7d9c4588c89ef2d819 SHA-1: 115db81bf22ef8480742091e992d9b5eb6e805ff SHA-256: c6b65527e1c3b482f41e964f419cbd9a5c5e448f66d93b0d9784f3dd33bd9a69
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary function appears to be directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6323

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://terwaarde.be/ckfinder/userfiles/files/resedetugubo.pdf In PDF document text
    • https://ajitcoatings.com/uploads/95004029543.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160913df86a126---56435153443.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b195ecdec50---babewujoxu.pdfIn PDF document text
    • https://airshow-bg.com/file/jumigixasuvusukovuvejuze.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/9ce7bb5418249630e722c2b340644caa/fawigi.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/7si5a5sj2421t76bfk57ct9gu0/17117358281.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/18202012617.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/84169654bd69fe4a02623b53ca9a9382/84141227925.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16090cc3c27601---jarexisadawos.pdfIn PDF document text
    • http://hk-dcc.com/wp-content/plugins/super-forms/uploads/php/files/cmf56r3dapaq4dis0ti48plob1/53330146312.pdfIn PDF document text
    • http://weymouthhighschoolclassof62.com/clients/5/50/50fe23896e84432c97ff20d680692bb9/File/80935397265.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/23571015299.pdfIn PDF document text
    • http://fygl.net/uploads/file/021105508568.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/lonan.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/5618a8d6683405a55524f43617b79a6f/witaxusanise.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/f16c487380a4e4edca6033f848a8b5fb/tusoratitizok.pdfIn PDF document text
    • http://www.toptehnik.si/images/78402642736.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///6634273150.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdb51361e42---60892546505.pdfIn PDF document text
    • http://manpukuorder.com/uploads/files/rogekenejorajo.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/0ahof05j22va2dbfk0jrc2lmc8/direkudi.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/3jbles1n7u1b6hjjipbi1uog37/28789975007.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=cayo+perico+heist+first+timePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD81 10740 bytes
SHA-256: 1dfa32fe7104b34b2e9a821a188a2b9c54b48ad59a720e7fb8b013004003f562

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