Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2317e7fca5ee10…

MALICIOUS

PDF

60.9 KB Created: 2021-10-02 23:59:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9d41cc0fe4aeff728704ea6a52474115 SHA-1: 827f61423cf061d0a68f15904912937183cddc78 SHA-256: 1d2317e7fca5ee102b005504cb966aa910b6c9717e9012e34f8ecd194639fb3d
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8102

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://pistant.ru/uplcv?utm_term=can+i+add+a+watermark+to+a+pdf PDF link annotation
    • https://www.antoniopopolizio.it/ckfinder/userfiles/files/tumirilenepevubam.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/pawemorazururaduzezej.pdfIn PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/gameda.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/pifiwudalapuluvozukamafot.pdfIn PDF document text
    • https://nls.vn/upload/files/44183350098.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614cbe91303e8---68313757627.pdfIn PDF document text
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0902/2d7030402c37d1c34070e5392802b9e4.pdfIn PDF document text
    • http://zeci.nl/im/image/kelalikowukifironut.pdfIn PDF document text
    • https://obchodsezlatem.cz/upload/files/29158634686.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/kozulosajuliw.pdfIn PDF document text
    • http://keramann.ru/uploads/files/gijaxovijaladalubi.pdfIn PDF document text
    • https://gamepinleri.com/calisma2/files/uploads/19364452297.pdfIn PDF document text
    • http://tuecpa.com/file_media/file_image/file/66042415855.pdfIn PDF document text
    • http://rc-saty.cz/gais/image/file/fujorezeluwixudis.pdfIn PDF document text
    • https://laatjehuisweerstralen.nl/upload/file/9624681319.pdfIn PDF document text
    • http://myoffice2561.sesao33.net/UserFiles/File/97780109422.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/vivonomamakefalajo.pdfIn PDF document text
    • http://mobilahomedesign.com/userfiles/files/55999022381.pdfIn PDF document text
    • https://czus-lukasa.sk/userfiles/file/togadabusatasitan.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/161544ca3137b2---rirozokodolilen.pdfIn PDF document text
    • https://lose-weight.tw/upload/files/18688931717.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1DC 16548 bytes
SHA-256: 61da01139f0809ccfdf3a87d392c84d1b0e0708447b98c25a1e3e2b036129740
font_01_sfnt_off0000dbeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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