Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce754b70a7740fd…

MALICIOUS

PDF

85.2 KB Created: 2021-08-31 19:58:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d4f1912ef8c53a5c9dd60f6d95b59ef3 SHA-1: 95792538cf5034c168e939c5cf372f2c37a8acf4 SHA-256: cce754b70a7740fd260206c6b3922ef68733b885cc5f0d9dec729cbf899f7515
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, with several pointing to compromised WordPress upload directories and other disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct user-facing content to analyze.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://abroadster.com/files/3633260458.pdf In PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/161057b474344c---80082185306.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/zabodezolewa.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074967cb4989---84021326011.pdfIn PDF document text
    • http://jaatkinson.com/userimages/53555692384.pdfIn PDF document text
    • https://globalcareerclub.com/FCKeditor/userfiles/file/gisadixa.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/7o4i4nfmoopvck27f24hhh6cmh/85046073575.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/d3cd5440326d9a702ce38950cc34fe5c/zowoziwevoxebimijeti.pdfIn PDF document text
    • http://bomtvplus.com/data/board/file/20210514191359.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160abf40887e5a---gizirapesixepulibagakuxe.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1607f50c37acb5---38131929579.pdfIn PDF document text
    • http://abwplazaview.com/uploads/files/61037536442.pdfIn PDF document text
    • https://area5srl.it/file/96098493152.pdfIn PDF document text
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/19522502755.pdfIn PDF document text
    • http://www.tsahimmongol.com/uploads/images/files/ravefazuwokuj.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/90152463500.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073bec276e29---36241444290.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/vkrajimilg3odcgghjaag3p9na/siwajenaxoni.pdfIn PDF document text
    • http://phongthuyphatloc.com/luutru/files/zoduribewogum.pdfIn PDF document text
    • https://clubelsendero.com/img_pag/file/zobamoku.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160fb45ce88128---62537666060.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/77198779715.pdfIn PDF document text
    • http://www.toptehnik.si/images/biveruwexekuxotutelenur.pdfIn PDF document text
    • https://alistairmills.com/ckfinder/userfiles/files/3066174884.pdfIn PDF document text
    • http://agermag.ro/mm/file/86667200312.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160712e0bee6e1---2297053006.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a462d93960b---21505922053.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/5114b7395c2c8cde252953d5ec451d0c/falowibozuruvoxina.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=family+and+friends+6+answer+keyPDF 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_off0000e906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE906 17640 bytes
SHA-256: 431c15f8dca77b6b7c5d94a46c3658570e10263c6b12b22fcd2f495bcbf128a9
font_01_sfnt_off000116a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A9 10732 bytes
SHA-256: 297b4370635f584cc3323ec6525360050e0f3cd3ea28b70cd0b61f3f3f92e698
font_02_sfnt_off00012f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1