Malicious PDF — malware analysis report

Static analysis result for SHA-256 24edaa2e11772404…

MALICIOUS

PDF

74.9 KB Created: 2021-10-03 06:14:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7adf5382c8e239542634b88889769508 SHA-1: d5f3e55b8a00ff5b371d9357ef7d880e7cb91127 SHA-256: 24edaa2e11772404a66645997c9b839d35f509e00b8c00c66a8a91f0e4ec6fe4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to numerous URLs, many of which are hosted on compromised CMS uploads or disposable domains. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL distribution suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/7ea07faa549fff74e765782de210870f/55384539819.pdf In PDF document text
    • https://sarvodayasamaj.uk/upload/files/buvukizumiwugoda.pdfIn PDF document text
    • http://pepinieres-soupe.com/userfiles/file/pagadokozetugonopaz.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/45293222336.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/dizejajesajeruterolo.pdfIn PDF document text
    • http://hferrynetworks.com/FileData/ckfinder/files/20210926_D2C9ABC7CC2C0950.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/65fa5b4eacac610a6c730e5166aab34d/guvaguvi.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/8347253912.pdfIn PDF document text
    • http://ybshajiang.com/userfiles/file/2021-09-18/210918040645694159msg6o27rkjoe.pdfIn PDF document text
    • https://ascii.tn/web/cgi/file/60205037047.pdfIn PDF document text
    • http://moretonassets.net/userfiles/29312324071.pdfIn PDF document text
    • http://vinhhangvien.com/upload/files/pakatafasoged.pdfIn PDF document text
    • http://escrima-rlp.de/userfiles/file/66081810083.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/08832a7c164fca4266db6975c7bdabb6/90226729980.pdfIn PDF document text
    • https://click2repair.chocoza.com/userfiles/file/17337154509.pdfIn PDF document text
    • https://hram-uspeniya.ru/ckfinder/userfiles/files/belifate.pdfIn PDF document text
    • https://kralpin.com/calisma2/files/uploads/vokikamogal.pdfIn PDF document text
    • http://wuyioutdoor.com/userfiles/file/fakaledajibiluma.pdfIn PDF document text
    • http://clubmaniacr.com/campannas/file/83732530429.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16132bbeebf994---rirubegowa.pdfIn PDF document text
    • https://hoangnhataudio.vn/media/files/81011647005.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/mazexajikizuwu.pdfIn PDF document text
    • http://cga82.com/admin/File/xojugunudasumekujokosub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=gene+autry+the+old+corralPDF 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_off0000bc9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B3 10460 bytes
SHA-256: c5bbe093d97f6fe278205c24dd8c5f8520200955fd5a816e27308d28997be04b
font_02_sfnt_off0000ec68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC68 18792 bytes
SHA-256: 360328b18dc86002bc74e9f16b9835b5f8e17346461caa11cb510fffbfee00bb