Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee4123be71ba27c…

MALICIOUS

PDF

73.2 KB Created: 2021-08-31 09:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 42d6d11bd932670d51a9a5cd1c5e7b36 SHA-1: 1ed1ba0296373d62751c13d2e62b6c36295bf27d SHA-256: dee4123be71ba27c362388afb6e6abd663a3bc6802c3fba4a4f08f8b6d903518
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external URLs hosted on compromised or disposable domains, which is a common tactic for phishing or malware distribution. The presence of embedded URLs and the nature of the heuristics suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://irlanc.ru/uplcv?utm_term=withholding+tax+calculator+2020 PDF link annotation
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/a9a6723b380f677dfcb6bd9ce9a763b6/xevakariwonajaj.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/ee7053c7f03efbbde7102b30d9fa3d86/zufemupewaxekitadap.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/gotifovixukipuliduje.pdfIn PDF document text
    • http://paraglider24.de/pics/fotos/1/file/74493609413.pdfIn PDF document text
    • http://usarsenal.it/userfiles/files/saposofotigugu.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/petapibowijenob.pdfIn PDF document text
    • http://everestlodgelukla.com/userfiles/file/velujupogumogideka.pdfIn PDF document text
    • http://www.lukoilmarine.com/ckfinder/userfiles/files/21113352894.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b1bb89238---86930404371.pdfIn PDF document text
    • http://zonweringbelgie.nl/ckfinder/userfiles/files/tulexijir.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160750bc34b4e1---67977668388.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/42189105135.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/uiosl5kg02ubs2p3or35ut3647/71041519515.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16072f25835375---85544127518.pdfIn PDF document text
    • http://www.detskaoptika.cz/ckfinder/userfiles/files/75209260947.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0298622413---90553722973.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c296f608a9---14844726790.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/guwasexa.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/d04a073b69932ba29a01588980623a6b/zosekifirumemabufekota.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/tebazafifaz.pdfIn PDF document text
    • http://zzweien.com/d/files/nedeviw.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/duviboja.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_off0000bd1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD1E 16396 bytes
SHA-256: 6ab924952baac11e5f4f88983245509f2dec146dff9decd215a8f867b756a4ae
font_01_sfnt_off0000e66b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE82 10788 bytes
SHA-256: 3c5166ece78538a61bbc83bad3398f83554ad09ede03c845bdcfbb3f1c777ef5

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