Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0218a54ba6eed6c…

MALICIOUS

PDF

80.5 KB Created: 2021-09-09 13:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b9c0ce79b4b0ea39f57860f291e0832c SHA-1: 998bef0e1d81ed6142aab5a36bc3314eaa6ca614 SHA-256: d0218a54ba6eed6cf1fe4f4ee736c7a7255f827c54579a0388790a749edda3fe
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. This structure is commonly used to distribute phishing content or redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • 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
  • 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://krisoc.ru/uplcv?utm_term=the+king+of+staten+island+putlocker PDF link annotation
    • https://kermoulin.com/userfiles/file/podebavisunibibov.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-09-07/images/files/zatenuxewozeriki.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/xegivaxifopotuposepir.pdfIn PDF document text
    • https://digireg.gr/upload/mupodix.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021090323485342.pdfIn PDF document text
    • http://iwayman.com/uploadfiles/file/2109031750065320541lx0ln.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/78695635895.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/161331f090607b---10315175229.pdfIn PDF document text
    • https://www.tratedu.net/ssss2018/assets/143ad273/ckfinder/core/connector/php/upload/userfiles/files/f20d0ac1c349f4407d23405ae0f69bc4.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/61590539718.pdfIn PDF document text
    • http://southerncross-ex.com/images/blog/file/suferosifipavitazugi.pdfIn PDF document text
    • https://iieng.org/editor/ckfinder/userfiles/files/80264968125.pdfIn PDF document text
    • http://zabbeleecooking.com/ckfinder/userfiles/files/81312935879.pdfIn PDF document text
    • https://madame-tina.com/ckfinder/userfiles/files/zevabamezijewudat.pdfIn PDF document text
    • https://ltes.tw-goods.com/UserFiles/files/71256484832.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/34957663125.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/9547877160.pdfIn PDF document text
    • https://kitchensofdiablo.com/upload/file/40050749859.pdfIn PDF document text
    • https://healthtecindia.com/userfiles/file/81369124088.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/25846014812.pdfIn PDF document text
    • http://fernandopelosini.it/userfiles/files/funurawebeki.pdfIn PDF document text
    • https://galerieportelouise.be/userfiles/files/sozokapivitanosuxuke.pdfIn PDF document text
    • http://gazdalkodjokosan.hu/img/userfiles/file/31174024989.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16137d03f9616c---jidopam.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_off0000d31b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31B 11056 bytes
SHA-256: 819c9e133999885c5cd729558dfd8d9048a9c97f11c657a2512b24ab52204c1b
font_01_sfnt_off0000ec99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC99 18328 bytes
SHA-256: f5c13e70e2e00d1ed07e945f8a438eccdc7f59e71f591c6d20a7a4d5a5fe27ef
font_02_sfnt_off00011cab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1