Malicious PDF — malware analysis report

Static analysis result for SHA-256 430aedd3c7617cd8…

MALICIOUS

PDF

88.5 KB Created: 2021-06-26 16:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 58093e0759fb7c2ddcc338b8084029f6 SHA-1: 5049840d6078b3a0a5e680136364569b82db84db SHA-256: 430aedd3c7617cd82b0ab31f4cbb4ac215dd3706b089f6fc313873188ffb3aab
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and potentially disposable hosting domains. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0622496a1---20187180675.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/993656adc3c74048c408ea1caf7b21e8/jozekirexujadifakokik.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160d6f64d8d99f---xoboxewalejojelupak.pdf
    • http://gemculture.com/userfiles/file/nefubosijo.pdf
    • https://kompaspt1.com/contents//files/43422762635.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/4e9b5fb1070dedc52d22651db6d13546/fotopoxepo.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d55e7e6f2---masudolebuvovapaxo.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa88c57b460---42530855848.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/s1ti3uihopn37pk24mraij2gpe/pezegexitemanololabe.pdf
    • http://technoculture.cz/admin/upload/file/nogozaxu.pdf
    • http://aucoindeshalles.fr/menu/file/xatilexodewejiwifukavax.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/416ba508212e34fe6ad51026b5a3de9e/69394389453.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb03944e217---63936112842.pdf
    • http://akcjonariusz.com/UserFiles/file/vofaperuko.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/cf6e259996b7d7ae24f2a3e95958607c/16634033876.pdf
    • https://cabsfromheathrow.com/userfiles/file/rajujexugu.pdf
    • http://thepdaitruongphat.com/upload/ck/files/91378759370.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c02968f1ee8---mowodonojidate.pdf
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833e590a914---84526135790.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/7d7evge5v36caga51ng4anfvd8/xodine.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/192f5c5cd7ab225ad4a5abad330ed974/lemagomoketujer.pdf
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/0e4a35e48fb9e19fe7f63575c8f5685c/napuxarowiroti.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/e0cc30f0d8beb1d68980684184c5a82c/24019470829.pdf
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/s4plpegmqvv0lcp6r2qrdivbq2/bopinedinik.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba13434792c---govimim.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=instructions+for+1040+line+30
    • 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_off0000f394.bin
5b1cf988cf448a703e8bd072c0b81da6263cb5f9da74e2f62f12365fe9076d6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF394 17848 bytes
font_01_sfnt_off000122b3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122B3 16792 bytes
font_02_sfnt_off00013aca.bin
eda769cc786d45092c75588b81f2039785360488ba0b7c7cd93bb869937d2168		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13ACA 10644 bytes

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