Malicious PDF — malware analysis report

Static analysis result for SHA-256 9024febf79d25089…

MALICIOUS

PDF

97.5 KB Created: 2021-07-05 08:55:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f51ed317459008f0652889bf9dc287eb SHA-1: a33a750959d949b3cbc8190cc59edcc4c5193979 SHA-256: 9024febf79d25089ba5723fce112809b86eb0d970cbd57be793cccb6cc0222bb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with many URLs pointing to compromised CMS upload directories and disposable hosting. These findings suggest the PDF is designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 6

  • 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.
  • 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://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a597318a9c---98572758127.pdf
    • http://maasmartcity.com/userfiles/file/logelukutal.pdf
    • https://srmresidences.com/images/bulk_images/files/3225681987.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160969a72ad9af---83401207947.pdf
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/e58a0a79a86d3077a2d313b8126896f4/79623250582.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160915f63bf790---97115185169.pdf
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/7039964224.pdf
    • http://stewartreunion2020.com/clients/2/2a/2a0d9dcdd57715375c9f4393c24df0f2/File/10576938178.pdf
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/2d518691ef44c1db3f66e35e2b9193a8/bekanojopazupo.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607208657d92d---27000922370.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b692283545---nenekubamobuviditaride.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/zireni.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/r07d7o1bqdcvq8bs1kc9ih78mv/magazegajosipemekojuvo.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c60a5401e8d---xesazutubelasusezefeti.pdf
    • http://ranahytta.com/ckfinder/userfiles/files/79891739695.pdf
    • http://atenngo.com/admin/sites/site/documents/5895768809.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b0993838f---73031585192.pdf
    • https://ruxthai.com/ckfinder/userfiles/files/sunesumiwagonigom.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cb2a0049473---paweporokaxugebibilukapa.pdf
    • http://doktor-okonski.pl/uploadimg/file/62801751395.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076d428a5f98---sunizafozoraporajida.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e48f6b0aed---bisem.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16078945a92a73---64165176886.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/472e5411b2925082ab1e7f5646f92969/jurawesivaxas.pdf
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608408fdd08d9---jeleni.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+convert+pptx+file+into+pdf
    • 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_off0001180f.bin
eaae8596c75a3253fb03fd9d5c5f11813f4ce9e0a220beaeddbfab623f93bf65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1180F 10528 bytes
font_01_sfnt_off0001301b.bin
5ebfdc75e8b016689755530b722c7fb2b663d59398513126aed9576e0d0317a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1301B 17732 bytes
font_02_sfnt_off00015ed3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15ED3 16792 bytes

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