Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea6ea847530b46c5…

MALICIOUS

PDF

95.5 KB Created: 2021-09-10 20:00:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e570a5b74fc5cc38ad93e9df71b4614f SHA-1: df00ac282cbd77aa147382da21d551875e3e2bfa SHA-256: ea6ea847530b46c5f78b168b5a9753f709f2001c3e99655f21a1d63dcb3cedf8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://catamma.ru/uplcv?utm_term=free+new+punjabi+movies PDF link annotation
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/66391458214.pdfIn PDF document text
    • http://cpk.by/ckfinder/userfiles/files/mugefififoduguzigidiful.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/53884208160.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131905a39e32---99214078276.pdfIn PDF document text
    • https://kokomanis.com/contents/files/78770638306.pdfIn PDF document text
    • http://confidenzacsapagy.hu/upload/2904579576.pdfIn PDF document text
    • https://digireg.at/upload/96525218963.pdfIn PDF document text
    • http://karimeh.com/public/userfiles/file/nisada.pdfIn PDF document text
    • http://solartgaleria.hu/images/file/45656850165.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/zenufamumux.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/68838006213.pdfIn PDF document text
    • http://artsar.pl/userfiles/file/lofedemutodeg.pdfIn PDF document text
    • https://careerexpo.alljobsinliberia.com/ckfinder/userfiles/files/kodupizapina.pdfIn PDF document text
    • http://littlepearlspublishing.in/data/eimages/file/69356892879.pdfIn PDF document text
    • https://vico-real-estate.com/ckfinder/userfiles/files/buxujotudigolokim.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16135df6e002ac---84146293366.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/monuj.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/31156346246.pdfIn PDF document text
    • https://peperita.it/writable/public/userfiles/file/49841318158.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613099e8d627f---gidogorebukibonifu.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9358d0446---vajapomanutuxozefanow.pdfIn PDF document text
    • http://dsraxys.com/uploads/69113430373.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/dibegu.pdfIn PDF document text
    • https://ibshospitals.com/userfiles/file/vanagituropa.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/68730961704.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_off00011268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11268 10768 bytes
SHA-256: d979e72e0b60b9aa6f57b1eb19cbcd7ce168896a79b95cdf83b0ce7e3ae75d97
font_01_sfnt_off00012aec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AEC 17456 bytes
SHA-256: f8e56dd892d2763e3fb4565cf1452ca96b8afdb02ef6b84f7fc9d0867d4a488e
font_02_sfnt_off00015868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15868 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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