Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a6b8d0a65f1c4be…

MALICIOUS

PDF

81.2 KB Created: 2021-09-15 15:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6357ec15dfae2ce2c31baaa217c89482 SHA-1: acbf1335d66eb82f869f7ef5521b2552a7613cde SHA-256: 2a6b8d0a65f1c4befa492cc78a41a384d9bdab135623af46cec9b5007d7929d1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple URLs, many of which are hosted on compromised CMS uploads, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL distribution are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140ed3ca50df---pajosaguw.pdf In PDF document text
    • https://zegaoyun.com/calisma2/files/uploads/dawuluzalepixat.pdfIn PDF document text
    • http://masterref.ru/editorfiles/file/92026691839.pdfIn PDF document text
    • http://hcvitamin.com/webroot/img/files/17261194531.pdfIn PDF document text
    • http://yjeverspeed.com/userfiles/file/42465961073.pdfIn PDF document text
    • http://weforyou.it/userfiles/files/pazenewagonokojikopes.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/059s6k8o9v2k6o2o60195kvgj2/datoba.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/pejubavivi.pdfIn PDF document text
    • http://thepducphat.com/upload/files/98810052090.pdfIn PDF document text
    • http://bikaji.zohukum.com/ckfinder/userfiles/files/68445912054.pdfIn PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/81276393379.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/72237866707.pdfIn PDF document text
    • https://limberhurstgallery.com/imageuploads/file/89248242971.pdfIn PDF document text
    • http://cantinachitarra.it/userfiles/file/peruvudoxozurijezovane.pdfIn PDF document text
    • http://justsayhi365.com/uploads/file/95080368915.pdfIn PDF document text
    • http://mexvp.com/ckfinder/userfiles/files/24580874192.pdfIn PDF document text
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/50272812616.pdfIn PDF document text
    • https://piauiaqui.com/ckfinder/files/tetajejutuburofubokolakot.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/92513241580.pdfIn PDF document text
    • http://www.sanjuktabanerjee.com/fckimages/file/31028210354.pdfIn PDF document text
    • http://foodzipo.com/uploads/userfiles/files/rodozutekobarali.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141b76c4a446---lozoviridovanasowaniwo.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/mugobubineg.pdfIn PDF document text
    • http://happyland-nsk.net/ckfinder/userfiles/files/87427871148.pdfIn PDF document text
    • https://art-lamps-rali.eu/files/file/fobanubuponuz.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614143fe19a4c---tosotofukisi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=boxing+live+game+unblockedPDF 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_off0000d7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BC 17656 bytes
SHA-256: 27cebb76b22c6ef1a7a3382da0c698983edfa402fa66663f707902f3d8ba56fd
font_01_sfnt_off0001056a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056A 10900 bytes
SHA-256: 9f539ce98e766e26d7a561168125b221f08c63699458f6c2fd0c4e585147c27d
font_02_sfnt_off00011e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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