Malicious PDF — malware analysis report

Static analysis result for SHA-256 217d6bf421945577…

MALICIOUS

PDF

81.6 KB Created: 2021-08-19 18:34:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c17a06ec4d4cfeb0f8c7fd436d8b1ce4 SHA-1: 75cc84be2c1c0d6b44e401485562aabf90e1fd30 SHA-256: 217d6bf421945577f24db591fe23aed7ff2ea73c1069235642d86d77bca30499
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, directing users to numerous external websites, many of which are hosted on compromised CMS uploads or disposable domains. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a deliberate effort to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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
  • 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 http://sushi-belovo.ru/files/25249291617.pdf In PDF document text
    • http://vipnjl.com/userfiles/files/79176975880.pdfIn PDF document text
    • https://khonggiansachhanoi.vn/uploads/files/59776430886.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/1fce1dfd37fee9a4905e6defbcf0c285/sasufexudidelazozetojan.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/e51gvell3mdro7e22ch6191886/55348970611.pdfIn PDF document text
    • https://fl-forever.com/upfiles/editor/files/dojenopubojogel.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/11d09295754d1a6c93f7ba7466661f1e/19426032501.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/wikaralazamuxuxikod.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/sumoku.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/xadimumajav.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16082fcaccae7e---91635537933.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a41d5c76c1b---26566611355.pdfIn PDF document text
    • https://csodamalom.hu/files/files/bifaritiborozixirijadizu.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/bupapotedovibolal.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/zowojalevugu.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/4dd9cb9cf3fd168d5fab04644c133739/jovudarurukav.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/1k8d35nm5rt0d5m9us115r1ht1/zifarupar.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/c5bae7f827c25e48350fcd32a0c4e08b/fujomekulukato.pdfIn PDF document text
    • http://hyundaiokla.com/uploads/files/vawabusalumu.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7c589b9043---43612894995.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/fbb942a8d82d1905945de265118b4081/35526991562.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/d84b88acb6e20c139df887ec188e3842/13384842809.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=virdi+ac+1100+installation+manualPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000da3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3A 16756 bytes
SHA-256: 0a6849f332990dd589102b1a97b378d80cb000d7a86d2601d661bdd64e12adf0
font_01_sfnt_off00010628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10628 10640 bytes
SHA-256: 681a434ad7f29090eef857922fff2f065e1138283f1cf915861425075061c625
font_02_sfnt_off00011e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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