Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee8144de7f91ecd1…

MALICIOUS

PDF

94.0 KB Created: 2021-06-27 06:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 18dff430fdd0cb9d82eb559f495357b6 SHA-1: 9f0c49767d82e331f1ea8c415e451db377d13e34 SHA-256: ee8144de7f91ecd1f0e42d22e4474db24adba1a249ccc0cca23d6be4da3fb1e6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF 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 pointing to compromised CMS uploads and disposable hosting, suggesting it's designed to redirect users to malicious sites. While no scripts were explicitly extracted, the nature of the URLs and the PDF structure strongly implies a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/uplcv?utm_term=looking+for+alaska+character+profile PDF link annotation
    • http://happypalettebnb.com/CKEdit/upload/files/jarixozutelo.pdfIn PDF document text
    • https://www.anandtirth.com/wp-content/plugins/super-forms/uploads/php/files/q429ddfci1kijlgiakntsrj806/30053009765.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/91855362864.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f190dba7f---vimafipasuvuvutidanenule.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/210da5cf9164f54fb4cf51b0bc213cd5/83420190041.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608e080f2be88---wefutuvagutipala.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094956d66e30---11467550074.pdfIn PDF document text
    • http://vksraja.in/fckeditor/upload/file/57071702794.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/bamifo.pdfIn PDF document text
    • http://fruhmann-elektrotechnik.at/sinugipiwutanupumani.pdfIn PDF document text
    • http://modero.vn/upload/files/gewatu.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/20763658814.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/30f85b80414661c74cc8d32ad023a0ed/zamitu.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/62754be2f3a5d755455cd8cfe5021391/30941198406.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/hkhtv0lnf1qvbh0s661u9gqvko/42710236841.pdfIn PDF document text
    • http://wawa757.com/uploads/files/melegivupa.pdfIn PDF document text
    • http://sevoir.hu/uploads/file/jixoka.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/18d81d306acafc31df48adffef890d0d/wazejoxokut.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608793a99460d---58868641318.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/93f21a7e14bde31b9419b3b751f29e82/zisip.pdfIn PDF document text
    • https://hotellemaritime.com/hotel/upload/files/30147885070.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_off000109ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109FF 10808 bytes
SHA-256: 9e0c688a60d86c5fba6c12c49197e52a644cfa2a313b87a4d70b4fa6769ea771
font_01_sfnt_off000122e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013af6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AF6 18556 bytes
SHA-256: addb152d0865e7447f3b49487ebcc96340aee211bce0e5d7826523a58b0b4f09

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