Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ba4f1840093e75b…

MALICIOUS

PDF

74.3 KB Created: 2021-09-12 16:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8c38e7b2e92355ad5e68fc875680a247 SHA-1: 75f63fc97978c234193a65941f9522678078c46a SHA-256: 9ba4f1840093e75bf8d52fbd6de7310680e7abdfc7fe5794483e24f9f454d4dd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to malicious URLs, such as the one found in the document body, which is designed to look like a movie link but redirects to a tracking URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://coretry.ru/uplcv?utm_term=tom+and+jerry+detective+full+movie PDF link annotation
    • http://damosushipleasanthill.com/uploads/files/zudixofasenagaxolax.pdfIn PDF document text
    • http://polaryachts.com/res/wysiwyg/file/gotos.pdfIn PDF document text
    • http://phupmirpol.pl/userfiles/file/duwubumufamagomev.pdfIn PDF document text
    • https://topconta.ro/userfiles/file/58692929171.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/lubevijafaraxi.pdfIn PDF document text
    • http://easyhypermarket.com/userfiles/file/begofapogobojos.pdfIn PDF document text
    • https://rajatotogroup1.com/contents/files/tawuvopobowapujuku.pdfIn PDF document text
    • http://werkkledingverkoop.nl/images/docman/files/fijevufuxagajuzugolijumen.pdfIn PDF document text
    • http://naturestuff.nl/siteimages/file/30813759937.pdfIn PDF document text
    • https://www.leasing.net.in/ckfinder/userfiles/files/1889172391.pdfIn PDF document text
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/37731872207.pdfIn PDF document text
    • http://mp-journal.com/media/file/77086784561.pdfIn PDF document text
    • http://ekorepetycje.eu/Upload/file/3898847911.pdfIn PDF document text
    • http://maketmaster.ru/admin/ckfinder/userfiles/files/nujofudizo.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0dcd2cb5f---73507208045.pdfIn PDF document text
    • https://emotionalgift.com/ckfinder/userfiles/files/jusopaj.pdfIn PDF document text
    • http://asia-test.informacittadino.net/media/files/82244278039.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/72234361335.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134148564d7c---mowumuravamomeda.pdfIn PDF document text
    • https://dazhonghua1688.com/ckfinder/userfiles/files/wotokuboli.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161346dbb173b7---tizavuwojatozozuj.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a864230380---95540058323.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/68523555584.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_off0000bd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD8E 10840 bytes
SHA-256: 028c341ed2ab51d71f925ffd6b72f8be7266cf919eef92e3e3561e9b1c65a1c3
font_01_sfnt_off0000d688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD688 17432 bytes
SHA-256: 1034d5268be46764b20111dc229ea3050c2225681545b11e3d66ee35ed823801
font_02_sfnt_off00010413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10413 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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