Malicious PDF — malware analysis report

Static analysis result for SHA-256 47205469d5613ed2…

MALICIOUS

PDF

84.1 KB Created: 2021-09-02 15:57:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: aa3faf8a12c8d65b21b5d232d7a0b3e9 SHA-1: 6e5c9543afe6a89d7cb2eae0125f4acda08a3001 SHA-256: 47205469d5613ed22c38ea6d769cd7277ae214f6825af6209afd9b7cb4fea59a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://chonburi33.com/userfiles/file/74750687765.pdf In PDF document text
    • http://iccarrentals.com/files/file/solutaluku.pdfIn PDF document text
    • http://montpellier-business-plan.fr/mbp/upload/images/images/upload/ckfinder/jumojijibafazupotulitux.pdfIn PDF document text
    • http://elijahlaurabishopblack.com/clients/b/be/bed082b287f5bb70db4763ab929fc18a/File/jofalokubemaw.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2dff0badc---jipapibuxu.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/53072108999.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/24617446169.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/kifomelawovetepa.pdfIn PDF document text
    • http://marketherballize.com/ckfinder/userfiles/files/jujiradelubiwogilob.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/50960328729.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086dc2467791---5082466038.pdfIn PDF document text
    • http://architettobotteonpierpaolostudioabacus.it/userfiles/files/jebupaz.pdfIn PDF document text
    • http://lhsclassof68.com/clients/73441/File/61974825069.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/xizar.pdfIn PDF document text
    • http://ebbers-schilderwerken.nl/uploads/files/melunidebog.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1305c61c0---zuvotiwot.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160fa81a13a08c---96329565443.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/66981905686.pdfIn PDF document text
    • http://sanmorales.es/userfiles/files/degixurefatoz.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/7fbf9ad2501aa3eff6cb8bf034bb34ec/wusaj.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/bofobukuwiwonawarovekobi.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/33881678929.pdfIn PDF document text
    • http://phunhai.net/upload/files/puwudet.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/60r58ho150130se9nqbtn4urkb/12153448601.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=pr%C3%A9traitement+des+eaux+us%C3%A9es+pdfPDF 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_off0000df2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2F 19592 bytes
SHA-256: 9e64f50b414c0b05435507428e0b41b4935afecf5f0680134691c09bf04d93e7
font_01_sfnt_off00011037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11037 10848 bytes
SHA-256: 2b1854832782b4d7c7f971a45a15fe80cfc0afa9fe8fa0e4ed27e61be386c793
font_02_sfnt_off000128f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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