Malicious PDF — malware analysis report

Static analysis result for SHA-256 47b5772f8debf944…

MALICIOUS

PDF

86.7 KB Created: 2021-09-06 05:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e70c14ce6f2defc6ea424bc0eb0b5dcd SHA-1: 1efe2d88b294af5921af0e08699e009d6ae8d143 SHA-256: 47b5772f8debf9447a2678beeb2e4b624656e51ce389d62055153c29ff657c4f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The presence of embedded JavaScript (T1059.007) further supports its role as a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16083b7a82652e---rilasosuro.pdf
    • http://lamorenj.com/userfiles/files/fewuligivofarabenomomuxa.pdf
    • http://domainecomps.com/documents/files/58878303900.pdf
    • http://www.vljainandco.com/userfiles/files/27732019495.pdf
    • https://inijariku.com/ckfinder/userfiles/files/winodedunajebe.pdf
    • https://tort-art.ru/userfiles/file/38292881987.pdf
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/497cdf406f6e862dd702857e20c6444c/kazofosaberazo.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea56d906f1---37179314206.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad3c0333c45---31319409804.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/ac69bb63c7324dcef50bbf7561538cdc/65338164517.pdf
    • http://argol-editions.fr/userfiles/file/kufewezolezuguminotos.pdf
    • https://atrax.hr/files/sowuxafejevojubazoru.pdf
    • http://lexus-custom.com/js/upload/files/vuvuxomoxijulem.pdf
    • https://mariellatriolo.it/public/file/1813400761.pdf
    • https://kitapkapla.com/upload/ckfinder/files/72350735432.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e159c5a3eb5---73111038838.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e4309a5a3---gizadak.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/06ade3beab9f370099f37df4aff07ee2/47140342995.pdf
    • http://bhs-class1957.com/clients/35434/File/2117529744.pdf
    • http://amexeuro.com/an3_Uploads/file/bivuwirapir.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1da78fd19---wililewas.pdf
    • https://rsun.pro/admin/ckfinder/userfiles/files/24373562357.pdf
    • http://nnhs1964.com/clients/a/a2/a2d7b74ded15306de89ee4bbe2f7ed3f/File/penuxavuzev.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610c8825ab3be---dukilajofotapuw.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/b7eukmthkch65luvi0tsf983fn/vokiwipuzafigomaruf.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=tamilnadu+school+books+pdf+free+download
    • 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_off0000e206.bin
027cfe77be3fcb335721366749d9ace2209a0633d6a5ec993ab943fa97e6dc3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE206 11168 bytes
font_01_sfnt_off0000fbb6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB6 16792 bytes
font_02_sfnt_off000113c8.bin
700555e0b9222e2402ee2d88921a8b30c681575353f4342ca116c98e6728d8a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x113C8 22048 bytes