Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb5c25ba8f4a1690…

MALICIOUS

PDF

92.8 KB Created: 2021-07-02 09:51:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6cd1f886115662aeb21db6b1446b94be SHA-1: 8c277f9acf7d3f6c6c4bb6ac45730d9e3eb5d3c8 SHA-256: eb5c25ba8f4a169027ebbf9dc1b21bbc64c2fbcfbda0c8973985415901e1c573
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and disposable domains. These links are likely intended to lead users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://topinsolventa.ro/userfiles/file/pidofesapegagari.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/9dad0828465a31746c57f2494d39659d/fomelisofisibob.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1842aae03---17362213446.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b93bf829c7e---ferifofanuvosafip.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a594af5e261---92629899276.pdf
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/287b5a67788456fad07270d399db454d/xesazup.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4aa33ca0a---faropefezosuzi.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/ueu6p2rou2vcsrfivavt2a7ue5/zuwukuzavozu.pdf
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b96b42d79---60675525348.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/b5e89cda7f83656658247786bf418cae/40364960439.pdf
    • https://prtl.pl/userfiles/file/81237713868.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b777d426d60---40103239120.pdf
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71021bd1f2---xagovovekatoseguzobagur.pdf
    • http://jameshamiltondds.com/clients/6/6c/6cc67b5d90347a591bf4e9c0b97a5143/File/boredaxoferaf.pdf
    • http://aucoindeshalles.fr/menu/file/wakarizazarifivegone.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160bf1bede6844---16313719673.pdf
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609691069d074---93604496992.pdf
    • http://lapenya.cat/imgjovesnaves/file/fodejolexolaxidu.pdf
    • http://yljx.cn/images/upload/File/solobezovozigitivusedip.pdf
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/q6o7netk4tkaec2fb2hchrbblg/fakode.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076379f7c3e9---14079453295.pdf
    • http://www.blueoak.fr/image/file/53161258874.pdf
    • http://timandlor.com/userfiles/file/45214742745.pdf
    • http://sanarina.de/ckfinder/userfiles/files/22717377308.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0bf01f9c6---gawosaligub.pdf
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606dbfb097a3b---toxanipilozutepuramofe.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=an+example+of+a+personal+narrative+essay
    • 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_off00010942.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10942 16792 bytes
font_01_sfnt_off00012159.bin
fa4b650c2615a03eafe989732cae49cf3da5a01273ed7b21f9fb656035df2cce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12159 10784 bytes
font_02_sfnt_off00013a37.bin
367e6009456f539152a8516d5a46b7feacc2dd05b84b1dc3b7d243534523e9ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A37 16628 bytes

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