Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a84b2597bd1c493…

MALICIOUS

PDF

122.4 KB Created: 2021-06-28 07:13:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3e9f119ecd96019a520a2b010071eaa0 SHA-1: f79745c69ee033e52a66091c7a09054eabb829e3 SHA-256: 2a84b2597bd1c49354982f6e499df8a419efd3371f634e7dec6edeeab2b8d67e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure itself does not contain readable content, but the presence of external links and the overall detection profile strongly suggest it's used to redirect users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/178438b2a82062d2beba0e1e1105452e/wujewobawezidon.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609925464ee92---xoberesarajakujorupekojor.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607803022eb5a---sifufazani.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160ada018f1b2d---zaregibefa.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3ac4f228d---wogazo.pdf
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/jadolabagepawosararawugu.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/b8da2d966ffddf1a0e051ecdc932ee9b/zexukifavipad.pdf
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/02b7f425ebb39cd2bcfffb762aa94914/41304776000.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/726ad50f8dd1f1f150556b2f4eca58d8/legisoja.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffba55eb66---28958252223.pdf
    • http://shelton1961.com/clients/35589/File/76093005756.pdf
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/5n8ct55cdihbh7ql1nfs91b5f7/zoweduxakugapage.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099d0263da36---25758047435.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160730c22c1ff5---90857900051.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/orihsg1hcnjdt89d8caiie8kol/wonozuvakikuk.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac7ec38f56---66849265775.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/4bfd8531b71acc51b904508de7d148f2/15134190983.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc776651b3---6323138223.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b510a00f914---91723469064.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160862ab809383---19956575260.pdf
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/fe340b543bc1d7933be314ed85887692/29897473988.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160afd04504d9b---97061980896.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=scope+of+practice+of+midwife+r2488+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_off00017bac.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17BAC 16792 bytes
font_01_sfnt_off000193c3.bin
049256d7f6687246915d94f054fadcf6e4b45b430ab44d85d512ae9b3cea2456		 pdf-font-stream PDF embedded font (sfnt) at offset 0x193C3 11032 bytes
font_02_sfnt_off0001ad9e.bin
67343f207f0a37b089b0afb71e310e67b2d0ecec7aa05146ce053eedb2025136		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD9E 17928 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.