Malicious PDF — malware analysis report

Static analysis result for SHA-256 4180df4d14e24cd9…

MALICIOUS

PDF

113.5 KB Created: 2021-09-06 19:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 2d0ff3219eb25628f6f7f11557ef64ef SHA-1: 1763b08b676ae148bfa848f46a426b6258048513 SHA-256: 4180df4d14e24cd9ce0f30f61a6ea92bd86695e8393e1362f6d53e910771f3e1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of techniques used to deliver malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://garglob.ru/uplcv?utm_term=redemptionis+sacramentum+pdf+descargar PDF link annotation
    • http://arkystudio.eu/userfiles/files/zoxizuxewuwobodasuvune.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/cb76b2cd731c7e4f945fc1e03464d805/9664978021.pdfIn PDF document text
    • https://ysh.my/userfiles/file/pajugase.pdfIn PDF document text
    • http://contentworks.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606e58202f40b---giriwifuwuk.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/21502478978.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/vibewurezimazavumijuzesog.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160abde433c6f8---joket.pdfIn PDF document text
    • http://csc0311.com/userfiles/file/20210714104257_gibpsv.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a49126e1d32---27539086112.pdfIn PDF document text
    • https://kozhikodedeaf.org/admin/my_files/file/44523594021.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.fr/userfiles/file/46419781903.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607378837b2ca---fekafezisinomimupufujo.pdfIn PDF document text
    • http://www.taylormadetc.com/siteadmin/ckfinder/userfiles/files/13394946085.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/bufadigulatogosepix.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/5987b4e7e0f4c00a51277051d57ad7cc/65249458911.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/wunefitu.pdfIn PDF document text
    • https://ivaco.it/file/nozataz.pdfIn PDF document text
    • http://3sdent.com/upload/files/40427607579.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/43cbc790bdc89f545a22f7d7a9446058/jolawapiratalogarumedike.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa98e17c892---52756764760.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/35024374786.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/47a305fb3f93c2f8f3fbe2426cc95471/bogunubonijogadebug.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/c8sf608favol7g5kl8hd3jqsbb/42626687095.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_off0001558a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1558A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016d9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D9C 18632 bytes
SHA-256: cb7c810adb918467dc41426b8310ef53f05325e19cdfd746d366d5e401ba979a
font_02_sfnt_off00019c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C7B 11064 bytes
SHA-256: 91f24e6db4b56535f7cf331dce06e31cf0901df9a5430dcb74aba828a95ae2da

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