Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc9b3928c2050464…

MALICIOUS

PDF

87.0 KB Created: 2021-07-01 21:42:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e96546fe7e7ba97fec3418ecbf9096d8 SHA-1: 9d010b1c4af7333e17f047d0577315a3ac78e21a SHA-256: cc9b3928c20504640a2890f8bf418e8f4707206a549ea6ed80f4cbd6daa64003
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. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and compromised CMS upload links indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://huntic.ru/uplcv?utm_term=does+instagram+notify+when+you+screen+record+a+dm
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160813c8fe2110---zezagabupivagelosilalewaf.pdf
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160b231d9f2de7---37869233115.pdf
    • http://stacjaregeneracja.pl/userfiles/file/91013169591.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160dcde9db5566---65923302614.pdf
    • http://beloezoloto.ru/userfiles/file/kiluvanetawasominu.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a641a3ee6e2---16462738602.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/odh72r07lhqpptb13lkbusu9e2/42301757153.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d44c503fef4---77813599333.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/6jj54jnqvr1q0793a4apdfq2p4/ketin.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4dd916cdce---retetejikotufitutofikek.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/0f0dafdc3372580c2228ce8cae09995b/famabasikuvapajugajoj.pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d58a7ba394---41548225556.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c726ea136a6---59021291077.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1c70802f7---40887776252.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608002e3bbb26---68879254147.pdf
    • http://studiotecnicopetrillo.eu/userfiles/files/sizoposanibezemar.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/e11be16d548b4e9cecf59cb6851ea510/lugisalesivotutemesuxa.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a024424809c---97684692907.pdf
    • http://coalcreekcentenary.com/clients/5/52/52f735e63eff8706e1a2a73a20aef632/File/97320785945.pdf
    • http://stavclearing.ru/upload/files/rosujudazozesoja.pdf
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160969b199aad2---zekupifox.pdf
    • http://tourister.kr/userfiles/file/tanulanevekobimogifu.pdf
    • https://pet-fashion.ro/mm/file/8186647116.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_off0000ec87.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC87 16792 bytes
font_01_sfnt_off0001049e.bin
c4042d471a2be8f9ad1258ae6940563c3e4f51ffa8a977f6b965c1b4754cff23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1049E 11180 bytes
font_02_sfnt_off00011e75.bin
17116431a40b76ca984ddc9d226b81b8fd92bd03053ff844b7e458e708805bdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E75 17528 bytes

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