Malicious PDF — malware analysis report

Static analysis result for SHA-256 461049461249d520…

MALICIOUS

PDF

73.4 KB Created: 2021-09-02 23:13:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c3de41cafd389d0f6c04d83558aa9d2b SHA-1: 02e1812c3cfab565f15748dbfc51aaeb546b0375 SHA-256: 461049461249d520a19e2d3e31a0b08b2191408ad8545de8e08c7fe71c9d2cb6
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to various websites, many of which are hosted on compromised CMS platforms or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. The structure suggests a link farm designed to obscure the ultimate destination of the user's click.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/ulo0njtn62ua7ibb9i8ccvo0fg/rolotevezixaganidiriworar.pdf In PDF document text
    • https://thebillionbottom.com/business_school/uploads/file/padawozukojapugeze.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/23613589961.pdfIn PDF document text
    • http://healthywithhart.com/res/file/4259936875.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607c99f30bcae---varinudawe.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/kenagometigukak.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/art79ojfvjqvvaebdqdn2o9vvg/97826678081.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/wufaguwewiduretotivu.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae16f2110a---fabaragakigidovenir.pdfIn PDF document text
    • http://entrackintl.com/uploads/kijajugenijepis.pdfIn PDF document text
    • https://activsport.ro/userfiles/file/34977768019.pdfIn PDF document text
    • http://3suntech.com/UploadFile/file/20210716090909985.pdfIn PDF document text
    • http://rykatd.com/files/saxakikudifafel.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/7cf59543a6fdfc8717ac529ee21e5426/murabedavawezidavixipopuz.pdfIn PDF document text
    • http://architettoletiziamasciotta.eu/userfiles/files/dikumabane.pdfIn PDF document text
    • http://pytextiles.com/userfiles/file/29889223800.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/12897730606.pdfIn PDF document text
    • https://badanie-wody.pl/galeria/file/gepizatizibitoji.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/9d318bbcac5d783a09b35dbbd3465633/52996883378.pdfIn PDF document text
    • http://cityclick.it/userfiles/files/25519734114.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/60315822876.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de2545e160b---42768917505.pdfIn PDF document text
    • http://michardardillier.com/ckfinder/userfiles/files/vovusagexesudiz.pdfIn PDF document text
    • http://mn-print.ru/ckfinder/userfiles/files/fegeger.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=1986+honda+rebel+250+service+manual+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_off0000b6cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6CF 16764 bytes
SHA-256: f74829065a8c26d853097a2d6fbd2cd7892347f3f2cfa13154960a169ffe1729
font_01_sfnt_off0000e1cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E6 11968 bytes
SHA-256: 85a10241c04765078f55596b154b4d289139b608c9c791cf00ef3bc0c0e18ace