Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eedca6930a5a2a3…

MALICIOUS

PDF

78.0 KB Created: 2021-09-12 10:07:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0dbe7b394e5fc1106725b27eea7ade6e SHA-1: 54386ca4c5e0112b18a4e52b0d3d6c68ef198490 SHA-256: 6eedca6930a5a2a39b313545157ca896563b4618fa412a133f7a1375356fcbbd
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to disposable hosting or compromised CMS uploads, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://agrando.cz/files/file/vepasalolusagixefejove.pdf In PDF document text
    • http://montazerangroup.com/uploader/file/xexofalatudikaki.pdfIn PDF document text
    • http://mfcpavpos.ru/file/90386164558.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/161309f5ae98b3---mixoxukakovopanazebiw.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/5472167928.pdfIn PDF document text
    • http://xedaptheduc.net/app/webroot/uploads/files/66826307397.pdfIn PDF document text
    • http://avstralianature.ru/ckfinder/userfiles/files/14856967928.pdfIn PDF document text
    • http://xingzhongjing.com/userfiles/file/20210911095316_416812240.pdfIn PDF document text
    • http://wwstationery.com/files/file/nesabefupefe.pdfIn PDF document text
    • https://kamionosnyelvlecke.hu/userfiles/file/gunozir.pdfIn PDF document text
    • http://wixoon.hu/upload/file/94253510282.pdfIn PDF document text
    • https://thanaclusterwestgate.leaddeehub.com/userfiles/files/89349360701.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/17480234900.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/wonifimiminozevaw.pdfIn PDF document text
    • http://solarwindependence.com/ckfinder/userfiles/files/vopub.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/33690632845.pdfIn PDF document text
    • http://dcbestwings.com/uploads/files/26391331532.pdfIn PDF document text
    • http://marchmontnews.com/imgs/file/46083152350.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc4660a18b---72735337440.pdfIn PDF document text
    • http://www.ciesol.es/ckfinder/userfiles/files/62646813750.pdfIn PDF document text
    • https://dmitrovka-zn.ru/admin/ckfinder/userfiles/files/31732755230.pdfIn PDF document text
    • http://760_709737661.mildmedia-dev.eu/uploads/userfiles/files/43253200204.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16137e44907200---57111695196.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4f44c50c8---33289435164.pdfIn PDF document text
    • http://vinhthuan.vn/upload/files/zutolenetukalireno.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=crear+un+reproductor+de+musica+en+androidPDF link annotation
    • 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_off0000ca3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA3C 10760 bytes
SHA-256: b8e339539a8357b87b7e8aaae07189630add098f81322db1f35e87bae4332c54
font_01_sfnt_off0000e2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F4 18332 bytes
SHA-256: c965ef5c086f5ed7d40dd09ab721ca4ac82e4b75d9a7b2fd68fadcc10b176cfc
font_02_sfnt_off000111d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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