Malicious PDF — malware analysis report

Static analysis result for SHA-256 c39e530e20215546…

MALICIOUS

PDF

81.2 KB Created: 2021-09-06 06:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 34a03db0b69b163bd6e6169c6b60d625 SHA-1: 0514817005d8fbd20fd5e89e167490012a26def7 SHA-256: c39e530e20215546de4c5dd4afb0a251d24d238b7bca8d6b48f5db6e1dbd5406
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://wastran.ru/uplcv?utm_term=ielts+answer+sheet+pdf+download PDF link annotation
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b472bc6dfc0---27201020432.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/sulosexaxewowisug.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210714163058.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077b41221e07---72169061414.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/1cfc34f379e4223ba51ecb6b622d2c7e/jufaja.pdfIn PDF document text
    • http://divorcefinance.nl/uploads//file/91135064692.pdfIn PDF document text
    • https://projetovm.com/uploads/files/65651597357.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/fa37ebc42519d13a88a7b50445b630ea/30154891925.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0dd7694edf---bozuvibilegiwero.pdfIn PDF document text
    • http://homeopathyhk.com/files/movutuwiruwofexuji.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/38335237249.pdfIn PDF document text
    • http://www.americaninvest.net/upls/files/73220921933.pdfIn PDF document text
    • http://mariekevanvlierden.nl/survey/userfiles/files/16732859892.pdfIn PDF document text
    • https://champion-osk.pl/userfiles/file/46549683726.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/drp0c1r1npptau9t1e1tmogkhj/64962091047.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fdc599ba36---9510832272.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/77405238457.pdfIn PDF document text
    • https://larustt.com/upload/ckfinder/files/29939198382.pdfIn PDF document text
    • https://itacademyindia.com/ckfinder/userfiles/files/57991739220.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/2b6c0869e80046ab056ae8d846b3be4d/zipipibisejagowigugoz.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086f9c661da2---gutovapuzekowibamubafat.pdfIn PDF document text
    • http://copelandreunionla.com/clients/6/66/66f6f3de7053633686652f51c4c00696/File/xaboz.pdfIn PDF document text
    • http://tragiaocolamsapa.com/userfiles/image/file/79281771010.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_off0000da95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AC 10540 bytes
SHA-256: 2f5294cfdf3b0e7cd69d7036a796d7e76236039ffca772adebc006c53a4031cc
font_02_sfnt_off00010ab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB5 17200 bytes
SHA-256: 44dbf89e83c98ae21facdeac477b2b80be8c984ff0deb51189e1c1b5f932c15f

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