Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbc6052ef28228bb…

MALICIOUS

PDF

76.5 KB Created: 2021-09-16 23:02:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 734ec29e1f6f80a8c0e6ba5b6c7822c4 SHA-1: a1f7c2894300f8891a34d1066a87be1ed36453dc SHA-256: bbc6052ef28228bb058385e5f38b8089c35dde8d4d73eefb4df6ba321683db8b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features a link farm pointing to numerous external URLs, many hosted on compromised WordPress sites, suggesting an attempt to obscure the ultimate destination and evade detection. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=adblock+android+no+root PDF link annotation
    • http://www.thaiboat.net/image/upload/File/kaguramijafumexig.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614046a3a12ed---vosogufog.pdfIn PDF document text
    • https://brihat-group.com/assets/userfiles/files/69561163605.pdfIn PDF document text
    • http://cuoredicane.it/userfiles/files/pepuv.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/6b078224cadef4e1766135dbcee2aed4/26391099867.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/fukivoji.pdfIn PDF document text
    • http://faisaltowel.com/survey/userfiles/files/lurud.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161336ee9c5394---valelabezizurutixitajite.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140ebecabd46---nobezodonulonu.pdfIn PDF document text
    • https://guenangequitation.fr/www/site/js/ckfinder/userfiles/files/torexigufakev.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137f2decdcde---84555672005.pdfIn PDF document text
    • http://www.horakgolf.cz/ckfinder/userfiles/files/koxov.pdfIn PDF document text
    • https://giltmorestukko.hu/ckfinder/userfiles/files/gilopagumibatusojuwepe.pdfIn PDF document text
    • http://lindendirect.com/ckfinder/userfiles/files/78025073776.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/fexekikusa.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/memaf.pdfIn PDF document text
    • http://xn--66-6kc8bfmkmjd.xn--p1ai/admin/ckfinder/userfiles/files/welipalozexumut.pdfIn PDF document text
    • http://nandishoverseas.com/UserFiles/File/mesoseletuwixexi.pdfIn PDF document text
    • http://smolninskayahotel.com/userfiles/file/joxudifoz.pdfIn PDF document text
    • http://profil-metall.de/content/uploads/file/75905166269.pdfIn PDF document text
    • http://esrafisek.com/images_upload/files/55653461338.pdfIn PDF document text
    • http://progetec.org/userfiles/files/zobimo.pdfIn PDF document text
    • http://st03.it/userfiles/files/91884251220.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_off0000c852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC852 17264 bytes
SHA-256: 17c90d51372d197aa0c2d1ffc381d6e6f02e2fed2e1f66f20639fca416fe1c29
font_01_sfnt_off0000f548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF548 10276 bytes
SHA-256: 93247592f2cbc6aa09f8dd9550376b6b75cf0a064d17ce023e15b1162420a31b
font_02_sfnt_off00010c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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