Malicious PDF — malware analysis report

Static analysis result for SHA-256 725c027f049ef9e6…

MALICIOUS

PDF

38.9 KB Created: 2021-07-21 10:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-24
MD5: 70d20d4967816b241d52291c59b98849 SHA-1: 1da3729f136c5a1c4c049ac89ba276841d92ac13 SHA-256: 725c027f049ef9e6db3bbc4d5a2a6f5e0cae242657817c60733ded7d4d6227d7
174 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 and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8588

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 38 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://agama-rc.com/upload/files/nemekowawazo.pdf In PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/tegugimexalexagetop.pdfIn PDF document text
    • http://petukmahaaaraj.com/userfiles/file/buxupokegolami.pdfIn PDF document text
    • https://venefoil.com/ckfinder/userfiles/files/pupalozuf.pdfIn PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/3868211752.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b258b054f---godiwimotonevaru.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16098eed9812f2---24782999256.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/25517082700.pdfIn PDF document text
    • http://loaamtran.vn/files/usersfiles/files/42593655736.pdfIn PDF document text
    • http://artgraf24.pl/userfiles/file/38512618053.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/c0d80a199850dddf575dbaff2d64414f/zifivevotopoke.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/41963999417.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/0250ec5875ce29cde924855f2debd560/lazavikades.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607bddc25bd5e---jagusi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=fnaf+4+the+crying+childPDF link annotation

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