Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f4aa5fd3e0b560a…

MALICIOUS

PDF

92.3 KB Created: 2021-09-05 00:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c3072215eb2b3674e359787c7c3636a2 SHA-1: a97813e58cac0658bc9e8a4d2fed3b9f17583648 SHA-256: 7f4aa5fd3e0b560a1b99c21df2072a0d14cfa24cfc87f6f77c718f498538e444
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to various domains, some of which appear to be compromised CMS uploads or hosted on disposable domains. The primary purpose seems to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7543

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://diamond6ranch.com/userfiles/file/57887826619.pdf In PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609263e23443a---31123509629.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/pga1vh7l4m493klf7ihe79ki09/zumeseba.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/rakogoxuxup.pdfIn PDF document text
    • https://upaspor.com/resimler/files/64983545313.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/vukilugafuwo.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/muberusufo.pdfIn PDF document text
    • http://honda-vo.com/upload/file/42594952785.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16075e10dded90---50325326263.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/gft4ho3bm53olij46j9ufl24dn/mogubuna.pdfIn PDF document text
    • https://bruceleevideos.org/images/file/taxupidutenonulejifuxami.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a84f96821---48482428547.pdfIn PDF document text
    • http://movitecnic.fr/ressource/site-image/files/46549891746.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607c834f34426---21544432018.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/58589556349.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/bc99905ee06cafe92d6cdea7105e219f/tenawenusoro.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/31795322212.pdfIn PDF document text
    • https://boyanbolyarski.com/userfiles/file/gejatovawiveg.pdfIn PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/robedogudebi.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160902e13c6207---gibegadulevuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=c+programming+code+book+pdfPDF 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_off0001346d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1346D 19720 bytes
SHA-256: 683291bfcf39d9c371777f6c3e5f70cc52de637036d803c96ad6c2daddf197ab

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