Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3d4b9da7cd2c87…

MALICIOUS

PDF

64.3 KB Created: 2021-09-21 06:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: d2e8be5443b26e9d9982c6ab68cc93ea SHA-1: 341ed88159de0b0795ad5f11541d43214b12128a SHA-256: ea3d4b9da7cd2c87aeef91dfc159d530ecf56dcfc12e1a1afecc6b935b6b0f48
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links pointing to external domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8595

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://coretry.ru/uplcv?utm_term=sweet+snap+mod+apk PDF link annotation
    • http://aibasylhet.edu.bd/app/webroot/ckfinder/userfiles/files/85610974269.pdfIn PDF document text
    • http://mbeautyconcept.com/upload/content_images/file/52555773116.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/161437f070e9b4---40648771675.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/9462773590.pdfIn PDF document text
    • http://npas.ru/pic/file/tegenodimivafenonavotilik.pdfIn PDF document text
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/tukativomufowejeb.pdfIn PDF document text
    • http://csc025.com/userfiles/file/20210920042048_wzj1a0.pdfIn PDF document text
    • https://rippa.pt/files/file/wezojo.pdfIn PDF document text
    • https://karolinanowak.com/userfiles/file/59357523690.pdfIn PDF document text
    • http://abc-tel.ru/data/File/41853521314.pdfIn PDF document text
    • http://tc-muehlacker.de/data/tcmuehlacker/userfiles/file/52415656047.pdfIn PDF document text
    • https://www.creativetalentnetwork.com/ckfinder/userfiles/files/69055273441.pdfIn PDF document text
    • http://tuclubcr.com/campannas/file/28495032926.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/10037683596.pdfIn PDF document text
    • http://effektfilm.de/files/file/kurerareritugeluvekul.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/gegega.pdfIn PDF document text
    • http://lamarchesainterita.be/lamarchesainterita/imgdb/news/files/tabefewaz.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eefc85c883---gojonug.pdfIn PDF document text
    • http://ototavandosemesi.com/resimler/file/2952286501.pdfIn PDF document text
    • https://b2b-intelligence.it/uploads/file/31817027111.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/vorafogitazulexurevulaxi.pdfIn PDF document text
    • http://confidenzacsapagy.hu/upload/womijeb.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BC 17912 bytes
SHA-256: 46fb8f339a75625b4928a225c8595ca54cba61a4ec6ff82062c97d8eb84b01e0

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