Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d60289f9c769cf3…

MALICIOUS

PDF

87.5 KB Created: 2021-09-17 12:10:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3d3dfe009da3304c351892428d6cfb43 SHA-1: e563ba74d7f0a7569c66a8eb438ef8071559ff29 SHA-256: 0d60289f9c769cf307df170b47d9198713a619728f77e3b4c99e8d7c37a9bef7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicative of a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://ketchas.ru/uplcv?utm_term=games+like+the+sims+for+android PDF link annotation
    • http://buyyoutubesubscribers.com/ci/userfiles/files/xulaligel.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/73028789651.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/8779864184.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/6852506e13eeeaa3d011e1ae13bdaa4f/43081649429.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/28526408051.pdfIn PDF document text
    • https://7mark3t2-7aya.com/contents/files/buwusizuvuzalirubivibi.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/29033402887.pdfIn PDF document text
    • http://teormech.ru/teormech/usrimg/file/takatujewu.pdfIn PDF document text
    • http://print-printonline.com/ckfinder/userfiles/files/lotelukoz.pdfIn PDF document text
    • http://packagingandfoodmachinary.com/userfiles/file/rititig.pdfIn PDF document text
    • https://pmcp-avac.com/files/upload-ckfinder/files/90621753430.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131b3c32bbd8---58527387613.pdfIn PDF document text
    • https://beamstraffic.com/amb/userfiles/file/xixibulojewukujajukukimax.pdfIn PDF document text
    • http://recuva.kr/upload/fck_img/1631219258/file/65803632103.pdfIn PDF document text
    • https://rajatotogroup2.com/contents/files/8150658924.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1614110d924a9e---kijogi.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/suredi.pdfIn PDF document text
    • http://web5gstore.com/Files/files/44540734906.pdfIn PDF document text
    • https://dienmayminhchau.vn/uploads/news_file/vorakuz.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161359c4941e10---77596557116.pdfIn PDF document text
    • https://epponline.com/mentorfinancial/page_images/file/ziwutokejalurapafubik.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/galunimilofedaletaf.pdfIn PDF document text
    • http://balletpanov.com/uploads/files/vuxepuretiboxuweburakek.pdfIn PDF document text
    • http://tottazo.com/userfiles/file/rinomexog.pdfIn PDF document text
    • https://segurodegranizo.ar/noticias/fckeditor/file/nibixino.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_off0000f4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B9 16544 bytes
SHA-256: 3fc6cf009c131bb10dac11c8b46ca36abacbf247dc02d48f13debc4f4b9601e7
font_01_sfnt_off00011fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA2 10748 bytes
SHA-256: e8a2ee0f67444ac553aeba86bcce6219c372b10b46bd383f90136b8ad5bfc41d
font_02_sfnt_off0001382a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1382A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1