Malicious PDF — malware analysis report

Static analysis result for SHA-256 16ec7e43e91397bb…

MALICIOUS

PDF

80.3 KB Created: 2021-07-04 00:23:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: aafb8d59d6fb8efcd917e4b7142a5897 SHA-1: 8600549718e2cdaab5463c2320a1bb36a7bb09c2 SHA-256: 16ec7e43e91397bbdd537216e9e7f5873fdee2f6479ae70f33fb5f3db6452001
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm heuristic indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a04aac69e9f---lugap.pdf In PDF document text
    • http://mitcostruttori.it/userfiles/files/61837474087.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/gefulinub.pdfIn PDF document text
    • https://vigiweb.cl/dinamicos/files/file/metimesamuj.pdfIn PDF document text
    • http://finemetal-cn.com/upload/files/69563001614.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/desogobawaf.pdfIn PDF document text
    • http://aweibel.com/Photo/file/lubotovagixunibepiwil.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c9209358539---zererilizijarol.pdfIn PDF document text
    • http://gtshotel.it/images/file/42913842426.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a57b12cd151---fadabekixamuxi.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/85cfd3f905efb3319e55f304d0e464d0/xugajimilanikiweju.pdfIn PDF document text
    • http://gemculture.com/userfiles/file/69146317374.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/c67a87e58517ceadc5287a3a2824df8f/49028572662.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/takusipotosad.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/dutakuluk.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f7420bd1d---fesisikejukaxe.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8c11c6902---vukebexemil.pdfIn PDF document text
    • http://stroi-sistema.ru/img/jafowenene.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/3nqvv88kbo5520jjchriui9b5a/94849320487.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/25974379263.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/11523802659.pdfIn PDF document text
    • http://ccforum.kr/uploads/file/1621320854.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/2a0fb1108962e4b49afd9ce9b7f815b7/34418055238.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/620ebb66ec307db99e3f1e1daaef87c9/97842607457.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/aa00nmi40me1lbeumubfhsfsb1/92628053655.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=percy+jackson+and+the+sea+of+monsters+read+onlinePDF 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_off0000d573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD573 16872 bytes
SHA-256: 771ad4a1aa28ec7fe5ebc4453868fa6b355befe62b22bac3a0f6ec9a871be5bf
font_01_sfnt_off000101c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C9 11080 bytes
SHA-256: 842c42afd541a3898d039b33e869d2e9ccb32d20217497626ee336937b32f330
font_02_sfnt_off00011b67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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