Malicious PDF — malware analysis report

Static analysis result for SHA-256 bed56c7e62d49fe5…

MALICIOUS

PDF

100.2 KB Created: 2021-07-03 08:14:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7c782676c7234621f2860fd34df74f5e SHA-1: 97536210cb4ffb53230488a60685b115b533b90b SHA-256: bed56c7e62d49fe554122f03efd1fe44dfac466e947ce6117bd828522fe95890
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery through these links. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/4390c454c5376df579ba003b768c4d3d/venewij.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a64fe1abd38---roker.pdf
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/16085c804341b7---19373394889.pdf
    • http://kanchanaspa.com/ckfinder/userfiles/files/tiniganapesovijavuzuvewad.pdf
    • http://podlahypilat.cz/admin/file/vikenukukovidu.pdf
    • http://flywings.sk/UserFiles/file/22366697938.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16079a656531fe---16279880312.pdf
    • https://naoshima-habitant.com/27393579225.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebcf9cbdae---94110735129.pdf
    • http://rotang.net/userfiles/file/92486016354.pdf
    • https://kompaspt1.com/contents//files/rofodozixarin.pdf
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/pubu5342smktpbj9mrd8vtulgv/baxiguwisimaruladi.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a453e15a6da---27032861466.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607994259ddfa---51369738784.pdf
    • https://kueapem.com/contents//files/xuliwebalomekedejifokeniw.pdf
    • http://curry-box-deluxe.de/userfiles/file/20504537798.pdf
    • https://amursvoidom.ru/media/files/kiguxemovisafekuxekutev.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/bts9n3mchm3m9ier70udopabqc/50602919676.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba2840cc19---todenanurenajirasewodeba.pdf
    • https://autosaloncenter.com/uploads/file/tukezufebibuwasujeve.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea7ff50a9f---burapebibojek.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=cut+off+for+jee+mains+2021
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001256b.bin
d808e4ddf3ba54a946b1280e84dce0385527ce01370881bc34e6c2bf682de1f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1256B 17272 bytes
font_01_sfnt_off000152c6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x152C6 16792 bytes
font_02_sfnt_off00016add.bin
894c7a62144566060607d1db3bd5fd6be38aaa20a2ec6b2a0ef68d3696be7e53
pdf-font-stream PDF embedded font (sfnt) at offset 0x16ADD 10884 bytes