Malicious PDF — malware analysis report

Static analysis result for SHA-256 87aa29e56ae6ab24…

MALICIOUS

PDF

73.4 KB Created: 2021-09-24 02:20:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 77062d1a094e5a09db7614d6066e0672 SHA-1: 0d4503ec7abf8ec1fe320584fe83843df3eb7491 SHA-256: 87aa29e56ae6ab2416382e536820c2e43f19968b8d6f5e1303885b78d3ed933b
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 multiple compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5194

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://www.fishhabitatnetwork.com.au/application/third_party/ckfinder/userfiles/files/54892140491.pdf In PDF document text
    • http://www.ortodonciaelisafarache.com/ckfinder/userfiles/files/16074854567.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/feed4a00e03d9381e3887f3c4a5b0c90/49702825126.pdfIn PDF document text
    • http://lycee-elm.com/userfiles/file/tokeruxodoli.pdfIn PDF document text
    • https://bartonsteel.com/tony/barton/ckfinder/userfiles/files/55897153820.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/63740193550.pdfIn PDF document text
    • https://implantologie-deva.ro/app/webroot/files/userfiles/files/12184503035.pdfIn PDF document text
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/19977491102.pdfIn PDF document text
    • http://xn--80aap0abfiql8h.xn--p1ai/admin/ckfinder/userfiles/files/94965530085.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161326cbd7b7bd---97965793328.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/xifuzuzevuloji.pdfIn PDF document text
    • http://aid-calais.com/userfiles/file/juvusegigadifoworigifenen.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4e47c584f---buputalukotofapisogevim.pdfIn PDF document text
    • http://britishcytology.org.uk/ckfinder/userfiles/files/dubasakosiliwe.pdfIn PDF document text
    • http://equipociclistaugeraga.com/ciclistas/userfiles/file/95593643714.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cdfe666e72---56463042750.pdfIn PDF document text
    • http://laptopcuhaiphong.vn/upload/files/solotawifosu.pdfIn PDF document text
    • http://telesson.net/_UploadFile/Images/file/51218345322.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/sinodug.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/38723509874.pdfIn PDF document text
    • http://medwin.kr/userData/board/file/34262746498.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614cf5745cc87---43880131789.pdfIn PDF document text
    • http://the100voicesofgospel.ch/fichiers/newsletter/file/modakikumojera.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=123+free+solitaire+pour+androidPDF link annotation
    • 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_off0000cc35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC35 17444 bytes
SHA-256: 7832e3de0aa03b4664d63b0e954df025848ba97604f975d59b70e056fe80d863
font_01_sfnt_off0000f976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF976 10840 bytes
SHA-256: 0b7a745946944439240e2fb136c4aec19569ea4e4feec12971d6678893cd70e0
font_02_sfnt_off000112a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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