Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea38fb579ce18a3…

MALICIOUS

PDF

71.3 KB Created: 2021-09-28 03:04:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: dc6e067eccf614f2ea747dc5f7212be1 SHA-1: b0336f66b828200f342b1997eb026b39dc80fe4b SHA-256: 0ea38fb579ce18a3391d569e440bb2f725a6eb4aa48b4a667109d945599d89e8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://allytemp.ru/uplcv?utm_term=teatv+latest+apk+download PDF link annotation
    • https://sunkamalzemecilik.com/userfiles/file/lemepup.pdfIn PDF document text
    • http://metalzilemboeventi.com/userfiles/files/43362505022.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16146621628981---40418779160.pdfIn PDF document text
    • http://glassick.com/userfiles/file/kojegodifojegasajad.pdfIn PDF document text
    • http://veterina-hrib.cz/user-uploads/files/93876218322.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/58889928495.pdfIn PDF document text
    • https://dacola.com/upload/files/xokizowutibefarezawu.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/79409834372.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/76781435164.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/36857262316.pdfIn PDF document text
    • http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135afed068ae---pojevirawosirisa.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/nemexawuvaj.pdfIn PDF document text
    • http://www.physedu.in/newsite/userfiles/files/56243543563.pdfIn PDF document text
    • http://ndt-ultratech.com/files/18344178909.pdfIn PDF document text
    • https://cuichi177.com/uploads/files/202109210528274896.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/5f7e1401df307aca40249cb324a848ff/24361946251.pdfIn PDF document text
    • https://888nv.ru/userfiles/file/92169535444.pdfIn PDF document text
    • https://verredistri.fr/xmedia/file/60018901047.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/olua0vqa0mg673l6r5313tmsp2/xutazivexaxow.pdfIn PDF document text
    • https://amadesafar.ir/basefile/amadesafarir/files/giwodijulolapasud.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/l182go6lisph9ipc0j0jrqh0t4/nafofikowatefim.pdfIn PDF document text
    • https://brincandoeaprendendo.com/fotosempresa/files/bewodusuzakuwijo.pdfIn PDF document text
    • https://krusomying.com/data/file/sowabonozuzupixunod.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/161313946982d4---ravivolopim.pdfIn PDF document text
    • https://andhimazhai.com/images/files/juketogeg.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/18374488899.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_off0000b608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB608 10400 bytes
SHA-256: 948e24527a3cc3cc3548edd8e3bab445287a83afff69a9c090692233355748ac
font_01_sfnt_off0000cdd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e5e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E7 16372 bytes
SHA-256: 02b18077721a1c4ff171c30366eac5600f40891cd6186ecf943f8c3b8773cee1

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