Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0af9d61a919a4ed…

MALICIOUS

PDF

83.0 KB Created: 2021-09-23 17:22:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 65a3054e16cc6f8e7752d9a3ffbb9303 SHA-1: 049d0279b0427591d644bbbcedb031ea302241fd SHA-256: e0af9d61a919a4ed4110787efc4267fad602ac2dc5be0795ce1de6136371da37
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised websites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the heuristic firings and URL analysis confirm the document's role in directing users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://philabc.ru/uplcv?utm_term=android+i%C3%A7in+en+iyi+foto%C4%9Fraf+%C3%A7ekme+program%C4%B1 PDF link annotation
    • http://mim2010.ru/userfiles/file/nonesivagisag.pdfIn PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/44233013046.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/guvulo.pdfIn PDF document text
    • http://keifo.ru/ckfinder/userfiles/files/naguvifegetilun.pdfIn PDF document text
    • https://vico-immobilien.com/ckfinder/userfiles/files/60941797908.pdfIn PDF document text
    • https://tranduongauto.com/app/webroot/files/images/pages/files/tufozarokibire.pdfIn PDF document text
    • http://stopguepes72.fr/userfiles/file/jagogonatelobazolubo.pdfIn PDF document text
    • http://cka-shiba.com/ckfinder/userfiles/files/74521549957.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16137279d3686b---17811085909.pdfIn PDF document text
    • http://fitviewer.info/files/file/15762661514.pdfIn PDF document text
    • http://dinobajka.pl/Upload/file/getefajipox.pdfIn PDF document text
    • http://cokhixnktientien.com/Images_upload/files/pusizavapifonis.pdfIn PDF document text
    • https://airbays.com/userfiles/file/51920199078.pdfIn PDF document text
    • http://wenxuezj.com/images/File/5684302754.pdfIn PDF document text
    • http://car-zone.sk/data/data/file/zadixufilawewewapemol.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/44307379575.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed1acc2e4f---vifusunawotajutuwe.pdfIn PDF document text
    • http://uran-berlin.com/userfiles/file/94618858354.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f903d9306b2e43af2fa6a7ad6903ff86/fijal.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161319df7f1d89---50722941457.pdfIn PDF document text
    • https://zerling.eu/nico/images/files/zavojixufajub.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/61062319297.pdfIn PDF document text
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/vatiwuxutarizaf.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_off0000dd42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD42 11292 bytes
SHA-256: f370d3a96335545fa1f440af7f57b5b4b2ec19526b02956ec96010f600834c4a
font_01_sfnt_off0000f71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71D 18188 bytes
SHA-256: ecc369c35f58930b20c0fa4fa03631d8f3ab9966a91487ebc64ff0be93c89464
font_02_sfnt_off000123d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1