Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bd1ea4702a0065b…

MALICIOUS

PDF

85.4 KB Created: 2021-07-17 17:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b76360daea951bd34195c66db8054b1d SHA-1: 9238e3d769af6d93b24c54ff17bd9da992421621 SHA-256: 6bd1ea4702a0065ba7569fd1ad3840f5252c07d77ad43c5cb783f05e7e6cafd8
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 WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac54bc54e1---58247108212.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/4lf1iblrq4coibmh5ithrjtfo8/sufafekiru.pdf
    • https://fotokeramika.bg/userfiles/file/zemirokulokipakilisad.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/2uikh4cjiijmisg0upd0r79dh6/dolodisarafowitefekakap.pdf
    • http://shsclassof1959.com/clients/a/a7/a7a82b2a6025f7fafce5d77be70bf845/File/wujokubib.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160889fd7a8ca7---puzaxurezabenof.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607a43ebb2a78---7669936369.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608de7b665f1c---74956571627.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b26ffb44668---wisevudat.pdf
    • http://otoozevran.com/resimler/files/zujovaj.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b83417340c2---81068871454.pdf
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/lh543re83c48s3884chjvhebdr/48621330323.pdf
    • https://dm288.rs/slicice/file/18050843062.pdf
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/q6rrvipql7gb5pqqgrvbkc6okc/19255911112.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16080cedee5735---wukuwezepibemalavegefe.pdf
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/5c8e92a66b860d38744114c59c6abde0/bopafamisofasobam.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160e00f5a72baf---ziribibunenerafudupixamax.pdf
    • http://www.chatanakonci.cz/userfiles/file/21140395193.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a2d91009af07d8fb9bf10c00a8aecb83/sefosexasinemovo.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/6536ab3ccf5829f66eb0b84640bb8396/jivavifone.pdf
    • http://amandatravel.com/userfiles/file/mafuzekedotipenil.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a751a92dacb---43135876400.pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607952e43a3f7---dixegiz.pdf
    • https://cmetrix.net/ckfinder/userfiles/files/45087362835.pdf
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/f7a51c770b48909b8bc1fb6b40a5bf1b/pomaxivexiziliwutup.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=beowulf+webquest+answers
    • 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_off0000eb4b.bin
2d4dbd9ba54e17e2baa664308ef265eae30cec42ef72823af118774d3baa12f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4B 17096 bytes
font_01_sfnt_off00011796.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11796 16792 bytes
font_02_sfnt_off00012fad.bin
fc3731e76c1c7c2aab36d9a12e8d8a6c64d9ea7b9dc65caa9274583243eefa20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FAD 10640 bytes

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