Malicious PDF — malware analysis report

Static analysis result for SHA-256 e60ddcd0eb016125…

MALICIOUS

PDF

77.0 KB Created: 2021-09-30 19:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 729ee8f64ad30563dd692dfb3a6704c2 SHA-1: 215a12a043e3f9078632065346d93e193ead88ef SHA-256: e60ddcd0eb016125b8e33991a04fe02e8acdb494a758111f85cebc134d8f926b
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 heuristics indicating it functions as a link farm. Notably, some links point to compromised CMS upload storage, suggesting a potential distribution point for malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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 http://www.pattyn360.com/upload/forum/files/27000151357.pdf In PDF document text
    • http://suspensionestg.mx/userfiles/file/nukutaboxugat.pdfIn PDF document text
    • http://nirmalamathachurch.org/cms_uploads/image/file/lopadux.pdfIn PDF document text
    • https://affze.com/userfiles/file/judijawiwegufut.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/3719941963.pdfIn PDF document text
    • http://yasairamenbar.com/uploads/files/84180279561.pdfIn PDF document text
    • http://ruihuitax.com/files/file/20871860422.pdfIn PDF document text
    • https://funbugs.ie/userfiles/file/patuvopufobabeji.pdfIn PDF document text
    • http://conelser.hu/fck_uploads/file/71088695707.pdfIn PDF document text
    • https://inmaabiladi.com/userfiles/files/19460141622.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/gesakofatenez.pdfIn PDF document text
    • http://grandioso.asia/editor_upload_image/file/92197370453.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613d6b194c52d---94398969852.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f72ea126cb---6088399539.pdfIn PDF document text
    • https://stiglic.sk/userfiles/file/12792660195.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/luxeneposurazaletudufe.pdfIn PDF document text
    • http://fuguchair.com/upfolder/e/files/20210929020424.pdfIn PDF document text
    • https://e-ssuances.com/ckfinder/userfiles/files/43380106755.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132e1ad45325---61827598042.pdfIn PDF document text
    • http://savitaco.com/uploads/images/files/vusaxosulinulubafi.pdfIn PDF document text
    • http://freetds.net/userfiles/file/jadalexojaratorajo.pdfIn PDF document text
    • https://www.tcf.gov.tr/ckfinder/userfiles/files/segipirokodisexilatezajo.pdfIn PDF document text
    • http://bernardthevenet.fr/ckfinder/userfiles/files/wojagufovud.pdfIn PDF document text
    • http://hp-cnc.de/uploads/files/76692989000.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/27216640767.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/a08c3f453ca770ca4d21f585056b3b4b/kefoxixukulomowapemetaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=zack+snyder%27s+justice+league+full+movie+online+with+english+subtitlesPDF 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_off0000b93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB93C 11648 bytes
SHA-256: 7e214dbdf332f9a614ecdc99032841b8b641a09dd84ee9342d0e9e2a76343f7f
font_01_sfnt_off0000d4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B0 21312 bytes
SHA-256: 778622ae42d343c26ab566fc318e1f46a5dce26993690948a72c7a6007e14300
font_02_sfnt_off00010b21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1