Malicious PDF — malware analysis report

Static analysis result for SHA-256 f00ef0a743e47c2d…

MALICIOUS

PDF

91.2 KB Created: 2021-09-08 02:27:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: d6b670288d8bf9c149f9949df1d051b8 SHA-1: e115de02bbfcf29071b0c3abdbac9766261f603e SHA-256: f00ef0a743e47c2d78ea8c85d4554c0a5a7bc47697a0aadfd9bea57a759f75c7
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a clipboard-command (paste-and-run) lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://archism.ru/uplcv?utm_term=i14+tws+manual+pdf PDF link annotation
    • https://fenicia.uy/fenicia.com.uy/uploads/files/31056353827.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c22ee2c6fc6---vodopewogedanulobunije.pdfIn PDF document text
    • https://aildf.in/userfiles/file/21983085097.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8c8ad5376---50190433937.pdfIn PDF document text
    • https://parc-hotel.info/file/sepomobesasa.pdfIn PDF document text
    • http://xn--franzsischebulldoggen-lec.eu/userfiles/file/mubozowan.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/wudinizapexutiravuxusi.pdfIn PDF document text
    • https://fitness-sport.it/userfiles/file/bowesuxozolamamamizekavir.pdfIn PDF document text
    • http://techbis.pl/files/file/46950799506.pdfIn PDF document text
    • http://yummyschool.com/_UploadFile/Images/file/19147686747.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/96460248972.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/lp1kd0aoaopjvk3179b60n2js1/juniromasatenimosabixaz.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/79169830474.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/43b0cb4cdd8f8071ade69a6b7ac71ce9/17668706535.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/f3ce59fb05f8f0a7a7f58c4c5da20f58/gekenud.pdfIn PDF document text
    • https://ekoelprom.pl/public/images/editor/file/roxebanukiral.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083bacb7a7a1---42673114388.pdfIn PDF document text
    • http://tumwebthailand.com/ckfinder/userfiles/files/11270153772.pdfIn PDF document text
    • https://wildarium.com/ckfinder/userfiles/files/zunebo.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6b8994fdf---sipudok.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/69308465671.pdfIn PDF document text
    • http://phongkhamthienhoa.org/images/files/1942754999.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/rf892h5epm8jc9313bdmv2l6ou/rafoxalofuropomi.pdfIn PDF document text
    • http://draftingfloorplan.com/ckfinder/userfiles/files/98938887382.pdfIn PDF document text
    • https://tallerescarrion.com/uploads/file/68928517903.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_off0000fedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDF 18868 bytes
SHA-256: 5687b6f508ef679c03a706add6231d7312c3685df393cbb0f54c66c2502e9118
font_01_sfnt_off00012f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001477e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1477E 10484 bytes
SHA-256: 8c9fda6cc4602594c88b063c983cd28a2f6edde8f4364cd1869386c7b29a36ac

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