Malicious PDF — malware analysis report

Static analysis result for SHA-256 8364e9494df01fc9…

MALICIOUS

PDF

72.1 KB Created: 2021-10-03 21:10:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e2bcb29301d6c6b2d0b8e07bb6415162 SHA-1: ac2200ef2104424eaded4fc1b39f1e056f17719f SHA-256: 8364e9494df01fc97bb10859eb97ea38f58a8f5678fe00990cc11eaffd9903a8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://divanich96.ru/admin/ckfinder/userfiles/files/95990547692.pdf In PDF document text
    • https://hnhaa.com/userfiles/tnejp/files/24696558614.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/dunijire.pdfIn PDF document text
    • https://anglarill.net/userfiles/file/4757547922.pdfIn PDF document text
    • http://denis-lefebvre-services.com/fichiers/file/zojos.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/zuvonubono.pdfIn PDF document text
    • http://janjoling.com/public/ckfinder/userfiles/files/sajibexewufof.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/nkidjlo3tckrljtbupq4jevfjf/disenalevesur.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614e400fbf10c---82894638105.pdfIn PDF document text
    • http://veterky.ru/ckfinder/userfiles/files/xemolazujuwos.pdfIn PDF document text
    • https://restaurant-kamkok.fr/img/Data/file/44178796558.pdfIn PDF document text
    • https://olivermilk.vn/tctt/sites/aaa/file/wukufepejito.pdfIn PDF document text
    • http://oiseau-bleu-morzine.com/userfiles/file/fowetijiriterasuji.pdfIn PDF document text
    • https://ce-mi.pl/uploads/userfiles/files/13180807022.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614e81f6477e7---56570171819.pdfIn PDF document text
    • https://red-adlay.com/upload/files/rezodifugapifetebamesebuf.pdfIn PDF document text
    • http://mansiya.com/uploadfile/files/44020140134.pdfIn PDF document text
    • https://speedwayinfo.hu/uploads/file/36089352828.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149dee4396f4---14209172939.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/6o41kv9g3vqlfj48aksj0k6ea7/mumowavikizedipi.pdfIn PDF document text
    • http://mansiya.com/uploadfile/files/14794559945.pdfIn PDF document text
    • https://tselectromechanical.com/uploads/CKfiles/files/25623320716.pdfIn PDF document text
    • http://www.centralperdana.com/file/levowigadot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=double+dhamaal+full+movie+downloadPDF link annotation
    • 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_off0000b6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF6 10644 bytes
SHA-256: cc2c9a4447d46e25400f26425b748ca2059a7b01122d73c23c8c9e1579f0b370
font_02_sfnt_off0000e719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE719 17076 bytes
SHA-256: 3708c5f0aba50277d11ffb68467db4f188b3822313608e88149877fe86549d25