Malicious PDF — malware analysis report

Static analysis result for SHA-256 dec0eea6354977bb…

MALICIOUS

PDF

76.2 KB Created: 2021-09-01 03:14:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 0152114b6239a98385069db91902a7e8 SHA-1: 4f2e996c3345e42da296d3f01ca436247c2514f8 SHA-256: dec0eea6354977bb6b0cad14dd3842f4cb93473a2a89fba01014236830197e18
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7511

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 https://chcial.ru/uplcv?utm_term=download+cheat+world+war+heroes PDF link annotation
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609723a4b2209---minenubiledul.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/10382972897.pdfIn PDF document text
    • https://ngaa.org.au/application/third_party/ckfinder/userfiles/files/sajebido.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad8109ff68---99024590238.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112252cb66d4---18565669188.pdfIn PDF document text
    • https://combrooncom.com/contents//files/sajibizuf.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/kuxakimusigexopo.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/5q6utuekr4jgauvhdu7bmi80ku/49720690366.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/dizajom.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/322729b06593879c76115ba74bc10de7/21090403299.pdfIn PDF document text
    • http://primaneighbors.com/userimages/44036641026.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/62698181205.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160740716f25ab---58573447845.pdfIn PDF document text
    • https://alate.org/admin/fckeditor/editorfile/200620564.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/88963492488.pdfIn PDF document text
    • http://islandpointfl.com/userimages/kaxomadimefofuzikomo.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/76193d2439918e25e1ee4116234f11b1/negefogonudilos.pdfIn PDF document text
    • http://studiocariola.com/userfiles/files/puvebofafida.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce30578207a---69161568693.pdfIn PDF document text
    • https://ncvpte.in/userfiles/file/ketezivonikogosiz.pdfIn PDF document text
    • http://anvlaw.com/userfiles/file/38407002781.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160f13143defa0---sadatenofowuwekox.pdfIn PDF document text
    • http://freeski.hu/freeski/file/rajekasunusotaduza.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8d03e08be---6740018773.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAA 17700 bytes
SHA-256: 1e28b5f57e80a158e980378e0d5a2eebc3a0733f5db015a709c9225ba13c8223
font_01_sfnt_off00010979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10979 10460 bytes
SHA-256: eb5498542cf7cb2908b082557398aeeaaeda5d9d9cfa4fbdac00178ebe2911c2

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