Malicious PDF — malware analysis report

Static analysis result for SHA-256 064db7b3eaefc59d…

MALICIOUS

PDF

53.9 KB Created: 2021-09-28 19:21:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 7681b4d02636f6636b96ed53eeb5e889 SHA-1: c93d690d100f5e94e35673232d0889e90144431d SHA-256: 064db7b3eaefc59d74dd759433aa968bb1212baca439a835a6d3999b0ba751e7
154 Risk Score

Malware Insights

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

The PDF contains numerous links to various domains, many of which appear to be disposable or compromised, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. The ML classifier and ClamAV detection further support its malicious nature. The primary function appears to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6810

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://saveondealz.com/ckeditor/ckfinder/core/connector/php/uploads/files/gujaw.pdf In PDF document text
    • https://dpengineers.info/admin/userfiles/file/bitomepojog.pdfIn PDF document text
    • http://natpuedu.in/userfiles/file/nexopukutofagij.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/31328671293.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb9cbab7ef---tanape.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/dokajonimakiponewore.pdfIn PDF document text
    • https://segurodegranizo.ar/noticias/fckeditor/file/vimifalununoxazow.pdfIn PDF document text
    • http://wajl.net/img/file/202198115658.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/85535262747.pdfIn PDF document text
    • https://www.gryf-wet.pl/ckfinder/userfiles/files/pifojutupu.pdfIn PDF document text
    • https://shatalarab-llc.net/userfiles/files/xosotetepi.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/04u4qvg8jtdkt3ihan8hfiggu5/36937226038.pdfIn PDF document text
    • https://mediaskills.rs/files/walifozonorolixidubo.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/41526586304.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/vif2gdfuusvbv1khfsqbt7tk4q/gadowokup.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/88337299568.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/fidibar.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/fezogexutomupox.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/kn5ckivkhvg70hemei5mpbr4c2/vovikijetig.pdfIn PDF document text
    • http://rkenterprisesonline.com/FCKeditor/file/rinulafej.pdfIn PDF document text
    • https://nhahangthanghuong.com/uploads/files/kefivolavavigokitef.pdfIn PDF document text
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/nunagovedadovuwuvixavewu.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/8b3u1pf72hfp31ji1k5c65dgt6/96099398236.pdfIn PDF document text
    • https://doublehaircenter.com/upload/ckfinder/files/fidivegudewimoxosawuv.pdfIn PDF document text
    • http://kingswaytyres.com/project/kingsway/uploads/file/35085745602.pdfIn PDF document text
    • https://ferropula.hr/files/73555027307.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=farmville+2+apk+downloadPDF 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_off0000bf41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF41 10628 bytes
SHA-256: ceac2e2dd3777eb1194744aba5715fe6da140c6b3a911ad3a5b9ebcc3aec6a3b

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