Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1011df4f6036f5…

MALICIOUS

PDF

82.4 KB Created: 2021-07-08 01:29:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1ae51476aa248661a4e468a42232523f SHA-1: 6a311c0f1034f6b41f0bccedd207fa0c64e33c12 SHA-256: 9d1011df4f6036f5b1a2d8ba1c386b7a201e964afd2ffa6799923a3b7dba6118
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as containing a link farm pointing to potentially compromised websites. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs, such as http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a280fabcb63---sexadutupax.pdf, are likely used to redirect users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://mywayrtk.info/userfiles/file/venamilefozusemewefasagol.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/08a05346f108892513ac212715f27cd6/84396252284.pdf
    • http://quickvideo.nl/userfiles/file/falezogelijowisafujotu.pdf
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/rpmbdf01745dsa3fukco747ga1/13733244823.pdf
    • http://webinaris.org/ckfinder/userfiles/publics/files/50502258448.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a280fabcb63---sexadutupax.pdf
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec52f417af---dumodesozetaxugijabe.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16085750abee62---7347358144.pdf
    • http://xboxheerlen.nl/userfiles/file/mizurubixojaribojak.pdf
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/e5mcd1oq3elg3nd19nk6iq37jc/zavef.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1b6ec8af1---28569883093.pdf
    • http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/65828703324.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754690b5c1f---melonexasowopiwujado.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608e08daae744---44745151688.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/cnp8c0ltftj9967ooetep30j6j/pusamaba.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16076aea98add0---17255276365.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a5bd91d8e---dalekukatilafotivaweda.pdf
    • http://glotecgh.com/upload/editor/file/fibubusasa.pdf
    • http://brucemsmithlaw.com/clients/e/e2/e252bfde01ef004f685a9648d307a4b9/File/21425247122.pdf
    • http://fitnessklub-impuls.pl/uploads/assets/file/ginolagi.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/f351d18a2ce72a3cebfabbd0494c61b0/nipodo.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/hhpu9d9gruqa9vn8jn6d2o9p7g/nuliwigego.pdf
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/03d46090decba114d5250f4845edb9a9/96300475448.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=august+ahrens+elementary
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db81.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB81 16792 bytes
font_01_sfnt_off0000f393.bin
9d8b5088a15a5bd89794ca0d90c7f9c9b5498643e6f8eda6200f4ac16b2bdd39		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF393 18868 bytes
font_02_sfnt_off000124b4.bin
85354af25b821366f7b7debaf26ca637ada253d5c65df86a495d16c497a94c92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124B4 10536 bytes

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