Malicious PDF — malware analysis report

Static analysis result for SHA-256 74c02c1a27ea0488…

MALICIOUS

PDF

96.8 KB Created: 2021-06-27 12:37:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bf2c06e500c37792cc1f2ace76935036 SHA-1: 9301a6fd382f5ee3d1424e190ab9e1b44f970b30 SHA-256: 74c02c1a27ea04888a61f80d61e47b5dc1bfbb7aff34e5e6aadd6c8877243fb1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, indicating a link farm designed to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of a link farm is a common tactic for initial compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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 http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b60b96e27---nosenapazigar.pdf
    • https://dolcezzecaffe.it/file/65993034148.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/fa4276d14f189ce3db9ae8253713e2cb/tagikavakolin.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078a63c6d5be---9360508697.pdf
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/d687df9b82bcfd53f8fe898a5d78e6d8/nopipoxepupefigozurupav.pdf
    • http://imssp.by/data/images/fxeditor/file/lodalisi.pdf
    • http://asckhn.com/acskhn/userfiles/file/xiwanutu.pdf
    • http://harekatmemuru.com/images/Media/files/zememeripiragifasij.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/f9bb0574dbdd0c881d1dc8d9fdd95083/rafozaresu.pdf
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/eqekguktcgs7gg43sl379astsk/28372687813.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/590c0077333dc58a9544d48b3d1b0198/89679338263.pdf
    • http://lt101shop.com/userfiles/files/95678220933.pdf
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16075ab20809b5---lodabugimorik.pdf
    • http://abaj.cz/UserFiles/File/nozit.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/d8aa32149de6f78599333f94edf3b5cc/vewezudifozumafinixababo.pdf
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/77fcee002efbc19887e7f50c4419fb2e/fododeverajuzi.pdf
    • https://mariellatriolo.it/public/file/vefasuba.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1608881280afe1---dinumalukuj.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b73767a396f---70847008621.pdf
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/2c8f0311a7f065e6ba9c74fc4e5bfb2f/tajedebukisodebede.pdf
    • http://pelesiuvalymas.lt/i/File/xirazidafave.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949cc147485---25406679953.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecbb2e38a2---pibuwadov.pdf
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/57322793617.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/a51c65d33baa3a60d4efbd933994a4a5/zezitaz.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=how+to+insert+pdf+into+excel+spreadsheet
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011497.bin
c186ebefa6db4b4bc35012230a83350eec54d68ffe079a2e090f8946de9469b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11497 17768 bytes
font_01_sfnt_off000142c8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x142C8 16792 bytes
font_02_sfnt_off00015adf.bin
3f74bcefcd2f7eae01b006ada764e25d7832bd1c295bd39acbb3d1678391f904
pdf-font-stream PDF embedded font (sfnt) at offset 0x15ADF 10896 bytes