Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ce5076ba6f5985…

MALICIOUS

PDF

79.6 KB Created: 2021-08-21 15:51:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4746dd0788513c126d494e91da5cfabf SHA-1: 83d0f6735c59d55e8b01c0536fafb1c65a563c4e SHA-256: 49ce5076ba6f5985caeaea5258ad870549d0db4dca08bcd3d0725f14becb95dc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a phishing or scam campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to external malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://irlanc.ru/uplcv?utm_term=dyson+v11+torque+drive+cordless+vacuum+cleaner PDF link annotation
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/bc5d397ff269eef2dc654eb5acaecfb3/puvobowumavefavedodenoz.pdfIn PDF document text
    • https://sanipacific.com/attachment/file/rijeribivanirawabiporal.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/kafuwuduw.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/8e3bd7fb9305a481c00bda5492ca3ff4/vuwagoz.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/f4c30f5b463f6a349e104717fd815b36/texip.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/161133eed87c37---69189551924.pdfIn PDF document text
    • http://changju-hotel.com/CKEdit/upload/files/28180639843.pdfIn PDF document text
    • https://glory-aqua.com/userfiles/file/powukibaxo.pdfIn PDF document text
    • http://thoitrangvabaoho.com/Images_upload/files/fusejujisukapexovo.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607219c7879d4---95540218055.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160882b9fb46de---somiwifu.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/7t78curtkii7bfal97eut955o9/niwujuzitova.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/sederuderexizawonawo.pdfIn PDF document text
    • http://xpeedon.net/userfiles/file/20210806134153.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/begubogulefovo.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/90695658773.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/sibidonojisepokigibotirom.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/05dspq374mqi99kbsv7le80lq5/bufewudaliko.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/nelemelemoj.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/94920433253.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/f776c39c169a5fdf5a5c036612ffdbef/lefapawat.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/xivobamavepuxibipir.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_off0000d5b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B8 11012 bytes
SHA-256: a90a24426ee3a5c0df6d656b3ce6c9c25e11970751924af5dcf3ef009cfb262b
font_01_sfnt_off0000ef2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2D 16052 bytes
SHA-256: 338834b93400bc953871dd001ff8fbb4ec71c2d1beedaa355e2d255f16a4c879
font_02_sfnt_off000118b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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