Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7bcbeaf56541f1c…

MALICIOUS

PDF

77.7 KB Created: 2021-09-04 13:42:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 64384ddf0c8040e850329df3d3858d1a SHA-1: 0e19b4b8986ccd247c3297a0daa84932bd08bf2d SHA-256: c7bcbeaf56541f1c30d328c34d97c0ff15e662dcf85bf2a663074f4e672d19ef
154 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of a link farm on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7521

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 https://irlanc.ru/uplcv?utm_term=citizen+ana-digi+temp+instruction+manual PDF link annotation
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160894353a7dbd---dokibarawodezapi.pdfIn PDF document text
    • https://www.larche-de-jules.fr/ckfinder/userfiles/files/92051413358.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612a2a8110b76---41384484517.pdfIn PDF document text
    • https://magyar-logyogyasz.hu/fileok/file/38528317542.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612d704a2a7ff---17839062648.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/79563005442.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/3cf31f851aec22c8fe3362409ed637ca/pugopekakimamiraguzewuguf.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/16fc42b95ecfcd554691564fbcf04eca/faxanigowetokagek.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1611a7c5e944f9---94871459806.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/328fc910193b03baaf9bd348f18bdb51/32413782773.pdfIn PDF document text
    • http://ongnuocdenhat.com/upload/files/82361533326.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ab61b35826---fawimusamepukatupikujazu.pdfIn PDF document text
    • http://bigdoughpizza.com/uploads/files/74367385661.pdfIn PDF document text
    • https://phoenixturkey.com/upload/ckfinder/files/jasulivudune.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/rudoginudamuxax.pdfIn PDF document text
    • http://www.donboscovizag.org/images/files/fixexubekixabuxopu.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722bb4d7c92---tilojubut.pdfIn PDF document text
    • http://dges.in/userfiles/file/44973264750.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071bc3838a25---50074055193.pdfIn PDF document text
    • http://condosworld.com/abisol1/userfiles/files/11871591245.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/kiragovugixibo.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/d4dca54bfbe5e25b64073856d3fef91d/nofututog.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/fobnpajgea2nhkh37rn84hjtb5/situbakadofaderej.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/ab908515028015789940c97a46e553fe/36078013376.pdfIn PDF document text
    • 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_off0000fbb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB9 22448 bytes
SHA-256: dffb12d6baec9028dc2d0e114d903e5f4a262466f8e2dae21dfb93ad085591be

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