Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebb01ab1ae247e76…

MALICIOUS

PDF

88.6 KB Created: 2021-07-05 11:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: b06280350169f1a122cdea30a8b1131e SHA-1: a6bc9ee50aa1f0538d036af86c7e8dcc16efe673 SHA-256: ebb01ab1ae247e76ca57ca3256f815a3a72162655d721a9893db2839e88e47e9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm on disposable hosting and pointing to compromised CMS upload storage, suggesting it's designed to redirect users to malicious sites. The embedded URLs and PDF structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://garglob.ru/uplcv?utm_term=characteristics+of+company+limited+by+shares PDF link annotation
    • http://irina-beha.com/ckfinder/userfiles/files/bosaravatujate.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa057696d7---43637815830.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c22e3eefec---kojakakomo.pdfIn PDF document text
    • http://djpress.pl/Image/files/duzojaza.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/618nml6ohkgau099vojpu1qtaf/rafudumagaxofopumo.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/4000e1cc9efcb2520ec83aee5a64fed0/wibujaxaxuta.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/a3e0e64c19207cf3fbff77d0eb415d4b/20899450609.pdfIn PDF document text
    • http://szyuangang.com/UserFiles/file///bofufosuwufevoxa.pdfIn PDF document text
    • http://katachizu.com/img/news/files/57454795146.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608035388151c---zereramodifakezekaduwaka.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210508200836_1180912357.pdfIn PDF document text
    • http://www.lugashotel.com/data/editorfile/1530692017.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160a440f925a76---73526687859.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7098a6b865---netumaru.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a43fa70035e---kapavojenogop.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072559a9d9c1---17733031136.pdfIn PDF document text
    • http://struttur-arch.it/userfiles/files/98601043944.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/354b89b6d29b689185152f9b21b8af87/79804381366.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/31525622359.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a6ad3122c---34107730937.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/sotatovedowaxilabiveg.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa177e316b---42739898410.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bc608ae735a---50025462925.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbde8dcc15---91582397816.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_off0000f148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF148 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001095f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095F 11172 bytes
SHA-256: 7be9a81b705f6ae6b18d9ecb69ccd3ffac6801d3e91475b5c63dead775d61016
font_02_sfnt_off0001231a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1231A 18536 bytes
SHA-256: 24865e5d4ffd08bfe51f1378e9d04fe2a0a74a611486e0742fd5ba2cb1ee5f46

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