Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc0591fd60e4029d…

MALICIOUS

PDF

85.9 KB Created: 2021-08-19 03:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 318025073fb765cb1101c2ca806113a3 SHA-1: 5a6291d43f139e68fa1ca234e88e3761d543bdd4 SHA-256: fc0591fd60e4029dfb083b8bd8d7c9d52763a2f98502c727fc620cccf0cf6b70
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or redirecting users to malware. The structure suggests a link farm designed to obscure the final destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a350c5d9c9c---dazowizesigolekuso.pdf In PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ff343f967---dinal.pdfIn PDF document text
    • http://ccforum.kr/uploads/file/1627189258.pdfIn PDF document text
    • http://hvpeds.com/upload/contents/file/56845467011.pdfIn PDF document text
    • https://tktravelkorea.com/FileData/ckfinder/files/20210709_ED3695E35D2CD863.pdfIn PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/91244589830.pdfIn PDF document text
    • http://mebell-city.ru/ckfinder/userfiles/files/dugosekegibo.pdfIn PDF document text
    • http://kcobafl.org/ckfinder/userfiles/files/78140617280.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d60dc9050d---vupuwojubufukepo.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b32dd710925---26040560285.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/95984624862.pdfIn PDF document text
    • https://smithsgame.com/calisma2/files/uploads/petin.pdfIn PDF document text
    • http://dreiseengrundschule.de/files/30187217091.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/2b1be7236ef59d50fdb97928675a5186/23928148273.pdfIn PDF document text
    • http://davidhammerstein.org/ckfinder/userfiles/files/wipiv.pdfIn PDF document text
    • http://desushibar.com/userfiles/file/78105161154.pdfIn PDF document text
    • https://lesfeesdelhetre.fr/upload/files/jutosatumofosukidub.pdfIn PDF document text
    • http://manhchenang.vn/webroot/img/files/topinoxopikaponarowun.pdfIn PDF document text
    • http://elskenecologie.nl/files/4530267261.pdfIn PDF document text
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9c5396178---69830861202.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112d7940394e---gagesefakapubijejot.pdfIn PDF document text
    • http://kxzyjy.com/CKEdit/upload/files/68581661636.pdfIn PDF document text
    • http://planetamama.ru/files/file/88890797220.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=2+for+6+arby%27s+2021PDF 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_off0000eb0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0D 10388 bytes
SHA-256: 9099c3d32ec3037ab92323ec49dbbf5dcc6122cc740653fbf7096be324a55efa
font_01_sfnt_off000102cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CC 17524 bytes
SHA-256: f38377c06d26ba34c5719b5df21fcf4507e894cba81c37f4ebe2571f5e2b33d9
font_02_sfnt_off00013057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13057 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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