Malicious PDF — malware analysis report

Static analysis result for SHA-256 6114fa6fd241ec89…

MALICIOUS

PDF

90.1 KB Created: 2021-09-06 15:32:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4a02a164a99c871dfd92653c069f9a10 SHA-1: ef1aa56e411538aa2b24f561b21440c1d29ba406 SHA-256: 6114fa6fd241ec895ecbcd94dce06d490ddb50afa58793f955d2c552d580cda0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous URLs suggest it's designed to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://pixomot.ru/uplcv?utm_term=how+far+i%27ll+go+ukulele+chords+pdf PDF link annotation
    • http://ambvetfanini.eu/userfiles/files/zuvojalezuzobukir.pdfIn PDF document text
    • http://meuble-tunisie.com/userfiles/file/69248959498.pdfIn PDF document text
    • http://lnaixi.com/userfiles/file/20210716230312_1725321013.pdfIn PDF document text
    • https://chongtham68.com/app/webroot/uploads/files/xinenimovuretoxe.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1611a7f50b155d---joxowevuvezijerip.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/0a3418451401e782a100b78849fac258/duzikobuba.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075da8d85427---58628170092.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/218642ce67612540cc49dfdac2f4caa2/jaxeze.pdfIn PDF document text
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/ropobujivuli.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c05a1beb4---jevusamitadejuwazu.pdfIn PDF document text
    • https://xn--fct8ml6mwue.tw/uploads/files/43845615969.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e64fad42c2d---64239262640.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/4327747729.pdfIn PDF document text
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/b7d516dc42e55f4962da2338f29c6f30/42233830975.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/99339403633.pdfIn PDF document text
    • http://karinameal.com/imgdish/files/magopegosu.pdfIn PDF document text
    • https://ibliberia.com/ckfinder/userfiles/files/dugukav.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/v2t6blp5jveubg504sbq2i5k47/80198434452.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/p5dfqdvf8ktdhefpc68qp31iv2/75646297333.pdfIn PDF document text
    • http://life-homeshop.com/asset/uploads/files/27232132571.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1608944de1631d---64560101186.pdfIn PDF document text
    • https://activepymes.com/pub/file/92097483387.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/264c4c4a77e7e41df5bee9f2bd111c3d/xapebozozozisupeko.pdfIn PDF document text
    • http://cgl.lu/userfiles/files/7414740924.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca71c38373---19431991850.pdfIn PDF document text
    • http://labsshop.com/d/files/gitixibavokinejigomamuwan.pdfIn PDF document text
    • 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_off0000f843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF843 11000 bytes
SHA-256: 3e2f75238e84a0321058474648c120f5a5139215462962b05aaba4b5de853220
font_01_sfnt_off000111d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E5 18396 bytes
SHA-256: 8056db290a6d4f75a4bc4f482cdbdbb49603de5d71d8fcb51b2403797c9cb203

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