Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc6e26e7fc614fe…

MALICIOUS

PDF

65.1 KB Created: 2021-09-05 00:45:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7d803a852e020c19b032858ec4f99007 SHA-1: b1409f6648f02149035ebba5d9ac8e87a44e5ab2 SHA-256: dbc6e26e7fc614feed9c87a2931c2346299b0be8a1f8afbf5b76817e7974d41c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous links pointing to compromised CMS upload directories, suggesting it acts as a lure or part of a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7964

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://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/2010b11ae7f7f1fad15f17320d1114c0/7309155313.pdf In PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a54e3314e---1655989030.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/37320130834.pdfIn PDF document text
    • https://naucharts.com/ckfinder/userfiles/files/85119452941.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16098d06130968---malezabaxik.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210528104959.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/b50c2410817f279439d4b742a9cf23c4/wafufininuwomanasi.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/98630177027.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/e0056e76927e5ab3494f06d0f3dda51f/tisopujamixiruwozubume.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cf9c3da68d2---wuwurunisalowukegizex.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160898287a52aa---tubefunenurumebubafe.pdfIn PDF document text
    • http://designgaleria.hu/userfiles/file/69635590354.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/50922550187.pdfIn PDF document text
    • https://callmarkinvestments.com/callmark/files/nukogiferaraposodibet.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202108170112523663.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c786f12ff---61077266684.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b2660b8f342---wodupulofosuvazufo.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/96brksonjmk85nfgqosep9kjg1/14549987696.pdfIn PDF document text
    • http://pho32shabu.com/uploads/files/nined.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c923f5e217---53043897318.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160790a9a86920---tavatadabixipejudiropazok.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/673115d96b68cdad7a6bac720cc67b42/dudapefolitizubi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=tally+erp+9+with+gst+practice+book+pdf+free+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_off0000e863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE863 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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