Malicious PDF — malware analysis report

Static analysis result for SHA-256 f94b9e5b4ac844f0…

MALICIOUS

PDF

80.2 KB Created: 2021-09-02 01:06:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 85faa3ef8ba1b5879d58ffe0802bed73 SHA-1: 62b8d520e302107c2adb9c38c567f6c821e12d11 SHA-256: f94b9e5b4ac844f0d2746d887c9f3574030f57c8b2b995e1f6e0643ce36eec01
156 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate this PDF is malicious. It contains numerous links to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF's structure and embedded links are consistent with a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://chcial.ru/uplcv?utm_term=bank+branch+operations+manager+interview+questions+and+answers PDF link annotation
    • https://media-get.com/userfiles/files/77595843500.pdfIn PDF document text
    • https://ln80.cn/filespath/files/20210831045422.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/52537654326.pdfIn PDF document text
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/xegakup.pdfIn PDF document text
    • http://www.pibmg.com.br/ckfinder/userfiles/files/files/88369311101.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/fcc38128198fd867a4c726c798c2a3b8/51628533605.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607ced0101ca3---razinokiwiwesinijobubumo.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/fofipawebav.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/26ce0f42bebb8e54c7f8a6d31762e95e/43734372611.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/domaridelakudafoguri.pdfIn PDF document text
    • http://okvin.org/userfiles/file/pirelivoziraz.pdfIn PDF document text
    • http://smcertificationservices.com/userfiles/files/99003919685.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/tifofojudeg.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/305d76e3968e0e6f47261828178051ea/11736149861.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad004c9b990---62985598691.pdfIn PDF document text
    • http://bikipvuikhoedep.com/app/webroot/files/editor_upload/files/lakajawavurokusaxe.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/8cbace9a12de08f8bc62fcda4744e6d8/gofene.pdfIn PDF document text
    • https://magerp.org/upload/files/jufepogilulide.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/xafeduj.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/51d5d5e6e9be9818fa96284474b13afa/55623663737.pdfIn PDF document text
    • http://oodow.cn/upload/file/210703061907808812tk86avz9m0k1.pdfIn PDF document text
    • https://nikunjfoundation.org/ckfinder/userfiles/files/97821421463.pdfIn PDF document text
    • 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_off0000d33d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD33D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB54 11596 bytes
SHA-256: a30c644b3cae9f7311526a5b6eb9dc583300f623482a08fafdc295b7cd25717e
font_02_sfnt_off00010613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10613 17164 bytes
SHA-256: 94391f7843d8a82699da070d03535fe6d1c874a3422b1a3382034e449e970fe2

Open this report in the interactive analyzer, or submit your own file for analysis.