Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6cf32df38b8afba…

MALICIOUS

PDF

77.6 KB Created: 2021-06-21 06:11:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 2055c8b6cb7590f4aa0e3a1e0bb38190 SHA-1: 13201f49f09b8c03abfacfd1a93616bab98079a2 SHA-256: f6cf32df38b8afbab0d8c5a097024969f078f0ea2df90733a42441f970e4c087
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 CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8745

Heuristics 5

  • 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
  • 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://c2r-auto.com/uploadfiles/file/2021062004573573499.pdf In PDF document text
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dajuwutasanamamib.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/24623598094.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16090c7a49069e---zalapufuwot.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/e16rdrm2j82t0tc752bedg3j2b/60984354653.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160784af26877c---85323804705.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bae553472b8---razevizibenamow.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607f697921c0b---tewedisezevumitawutop.pdfIn PDF document text
    • http://etabetasurvey.com/userfiles/files/fuwikapizaz.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b8cccd410f3---58420895948.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16088dd92b9763---musemofepaxelowutow.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2684a9b481---xatawululinivukexikomi.pdfIn PDF document text
    • http://e-hane.com/files/xexoditu.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/pudunanamesexapasewiwugi.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/98453505407.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bbf329ab71---botiturasor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=9th+standard+all+textbookPDF link annotation
    • http://scripts.sil.org/OFLIn 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_off0000e422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE422 5244 bytes
SHA-256: 45101e4be7e7c1c975dfb22de4c3a5b758573612b83988c0d032611972a5e6fb
font_01_sfnt_off0000f5e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E6 10708 bytes
SHA-256: b05335ad5f238fe7489336b7dd9dc756f9567bec248fedebd1b215690b6f5a0b
font_02_sfnt_off00011a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9B 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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