Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bcd36083d45c2d6…

MALICIOUS

PDF

66.6 KB Created: 2021-05-12 17:51:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fd53662902bdfab2f54b3e888a59423 SHA-1: b07cbdcaa85237a850b446e34e1f9bfce518de1f SHA-256: 9bcd36083d45c2d69060c6c2e43c955486e3205d538586669f829a7d09255c25
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated and appears to be junk data, but the presence of external URIs and compromised CMS upload links strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8377

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://crysiq.ru/uplcv?utm_term=microbiology+job+interview+questions+answers
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608301433e045---takogaxirejazamamevifat.pdf
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c1e646a9a---94407900600.pdf
    • http://ankamet.com/userfiles/file/9284097505.pdf
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098ac516a2f1---nikona.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608485da771bd---54942504525.pdf
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/6282226d6022f0257b4a6d69676f793c/91799331015.pdf
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/c8fa798562a2967212534870b6d8e997/41041468193.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/49f4034322fff986bb845d1608a5b4ea/40846776073.pdf
    • https://samyenngochoang.com/wp-content/plugins/super-forms/uploads/php/files/8hj758fafo4o4tinop5dpiif97/pubumejivedomufuridobof.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/e529aa87672678f86972f63852378d28/lesagikipivuzu.pdf
    • http://bizbecho.com/pa/trainstation/uploads/image/file/38154581918.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c61ef31b8---batupuxerumakajonij.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/62514543542.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858f5339e64---ziremubizivenu.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/bc26648be96531862e4dfc1a3f6c162f/movuzegotafimi.pdf
    • http://akcjonariusz.com/UserFiles/file/47186621961.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd79.bin
02446c73b54863360c8bcfd99fdb666f56dfc7b141d336a03cef4f265e29e429		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD79 5568 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.