Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ed0b37f37d7f39…

MALICIOUS

PDF

96.6 KB Created: 2021-07-30 22:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: dad669c9e193c3f566801026e2dbc655 SHA-1: 8138b23083eecd5da53efec0ac5e6fd87e521ee4 SHA-256: 95ed0b37f37d7f39f4de015e21cb1bd753cdd2c3523fdc3988e2d47112126006
196 Risk Score

Malware Insights

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

The sample is a PDF document that exhibits characteristics of a phishing lure, specifically prompting the user to install a browser extension or update. This is supported by the 'SE_BROWSER_INSTALL_LURE' heuristic. The PDF also contains numerous links, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. While no scripts were directly extracted, the nature of the lure and the presence of external links indicate a likely intent to download and execute a second-stage payload or steal credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085da6b2146b---32638455862.pdf In PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160e778000d76c---15768691428.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160bf2d2bd9d29---35025988718.pdfIn PDF document text
    • https://intellicapital.in/ckfinder/userfiles/files/kefatuzin.pdfIn PDF document text
    • https://tour-paris-guide.com/cite_imgs/file/gagekamakirawulewule.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607f13093be0e---80239139517.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210702101825.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab1184c837e---kadifebezakoxasitil.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/d89400dd47e2059915080d73a4fea47b/jelunu.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/wexuzaxodikimopivumemig.pdfIn PDF document text
    • http://whatdwellswithin.com/file/19306275777.pdfIn PDF document text
    • http://fygl.net/uploads/file/091941286279.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/zufimugopajikamemusafizo.pdfIn PDF document text
    • http://vejwun.cz/images/53522758407.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9b2ccb0e9---toketerora.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f33a2122ec---92019738595.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813f0042aac---21932488626.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a49650440cf---30326123814.pdfIn PDF document text
    • https://livewireeventz.com/userfiles/file/81584862580.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce0ed0f73c---67838366262.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609895128363c---jisisiwarunovevikowurute.pdfIn PDF document text
    • http://chinoboxingclub.com/clients/36032/File/zizomam.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf3b20fc3c---76774985628.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16089b2624f926---14482611675.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/bilolemaremewigakiroz.pdfIn PDF document text
    • http://soyaksiesta3.com/userfiles/file/62933845447.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=edgenuity+math+2+unit+test+answersPDF 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_off00010fc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC6 19404 bytes
SHA-256: a2eada172eef3a0ae25a2836cb20ac6d24f0eba2403fe199678d5743a8e2a26d
font_01_sfnt_off0001439c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1439C 10932 bytes
SHA-256: 35f4fe7b96d3300973a159e9af61d64b312d69ff7a7c7f9e4e851687baf8db9f
font_02_sfnt_off00015ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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