Malicious PDF — malware analysis report

Static analysis result for SHA-256 31b63658b5acf34e…

MALICIOUS

PDF

76.1 KB Created: 2021-09-08 00:57:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 3e1b26f63f58733416c2feb4fb4aa461 SHA-1: c4ada6cd4303f7ff6061ca508f6a119b95f28199 SHA-256: 31b63658b5acf34ef52b15ac867dd371e7b125efb152f504b53afa0b8fb9d9b0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites and disposable domains, suggesting a phishing or malware distribution attempt. The presence of external URIs and link farms indicates an effort to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6397

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 https://krisoc.ru/uplcv?utm_term=taj+mahal+history+english+pdf PDF link annotation
    • http://rheumatology.institute/upload/content/file/13188366519.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf59bbc6015---wanapuviteruwixematoxemo.pdfIn PDF document text
    • https://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/318885746f9d194ddfdb1296f03efddc/29483737747.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d04e01baec---2116437092.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/2110a329e6615fc35b0bd33a14f65c13/pabilijogegudagix.pdfIn PDF document text
    • http://portakalweb.net/home/portakal/public_html/ckfinder/userfiles/files/33161520833.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16086cecaa4fe5---45723450260.pdfIn PDF document text
    • http://yourtruck.be/upload/ckeditor/file/68611296253.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/63hbdpc61bg051dvo8bcbvd4j6/selabomalazadebetovo.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/ro4canm97npqbq00jq1j9uv0v3/kodolexuzi.pdfIn PDF document text
    • http://eapver.com/upload/ckimg/files/202108292016268269.pdfIn PDF document text
    • http://wdnederland.nl/file/wupiwafep.pdfIn PDF document text
    • http://doyen.cc/images/upload/File/84422725968.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/vokujunuzi.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/01db6c60845748eea3ef34e0bd89f49e/rogawud.pdfIn PDF document text
    • http://rideco.hu/upload/file/27071530250.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/58c65ef6273f714d68bde401a8a972a4/84604931664.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/c6213c7fea2ef2d450414afdf7185daa/sedegamenak.pdfIn PDF document text
    • http://clarkstownhs64.com/clients/2/25/255c49a504cbad61718694d8b78dfcdd/File/lenupesebabitefak.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/88561176826.pdfIn PDF document text
    • http://mudrberanova.cz/userfiles/file/titaxan.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/hoq0cjfv486fhaicbabme923g4/83782111353.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bea9d03f262---guxopeboxironisofome.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1611a89f6841fb---20549998737.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a50d8109ff3---49496196341.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105051347194417.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC95B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE172 11152 bytes
SHA-256: 96dc08dbb2aba680ae647495ef5caa3eb980a61d8abbd5dc9b1043ef32243789
font_02_sfnt_off0000fb15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB15 21796 bytes
SHA-256: 3c238ef31589f10fcb5572775066b3f9ceef2369c0722e959b1e705dbb71eefc

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