Malicious PDF — malware analysis report

Static analysis result for SHA-256 09acee072c90f61b…

MALICIOUS

PDF

85.8 KB Created: 2021-06-27 02:28:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e8e69b2324d545cfb7570ac6e268283a SHA-1: d5237de8da9fc22a2164d94abac457e6594ac7b9 SHA-256: 09acee072c90f61bd7e31e38cd625c475af150d231a3c40fff85fc891201189c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a link farm used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://cructi.ru/uplcv?utm_term=my+betta+fish+is+bloated
    • http://dzbnf.com/upload/file///vegulegikejowasuluwasit.pdf
    • http://guojingmall.com/userfiles/file///tavewajimivo.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf4fcc42a9---mobadibawiporiraxozotu.pdf
    • http://hydrem.ru/images/file/81835237579.pdf
    • https://tosto.cl/ckfinder/userfiles/files/tinovozojufijonuva.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/2cebc7dc6c5ccf6b5d203d19282d8f69/minodetixo.pdf
    • https://geneticapanama.com/userfiles/file/witezaroma.pdf
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/djpnvoikd69va0nl501vpv01fe/14492205121.pdf
    • http://fujavietnam.com/images/Download/39428020987.pdf
    • http://laclonghotel.vn/upload/files/jinin.pdf
    • https://wagaskar.com/media/35314261220.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/qeb32qcrm5qnrjac83msddetln/15295390109.pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe1a3ad8cc---sasupubepowamejis.pdf
    • http://alexhofford.com/temp/files/file/puwanixafemumixafamena.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d08881222b9919efbaf4f86710c6fa5f/47044754616.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081807e0a1db---5282549904.pdf
    • http://ahkjt.com/upfile/file/17549793268.pdf
    • http://ccapostolicchurch.org/clients/1/19/19d200bce63520a637954fb60b162b1a/File/zudabexivuf.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a01bc819dda---latizomamaxidonejezapeso.pdf
    • http://bafiti.com/sklep/userfiles/file/buzidedusokupemanal.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160b5683962b4f---9793296581.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aec151793b8---37215923496.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608260b5aa7c0---ruzalavubiritosuz.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/6338be63a4441666100560cdc0fa5a71/81600554816.pdf
    • http://pomocnaukowa.net/Upload/file/30156896570.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_off0000edd1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD1 16792 bytes
font_01_sfnt_off000105e8.bin
5f22fa45cd413e590f33e3fadb8cf71969342913c638cb577a01cdeb21d6d272
pdf-font-stream PDF embedded font (sfnt) at offset 0x105E8 10492 bytes
font_02_sfnt_off00011de2.bin
4f84d4adb205af467461c7cf8e9730b7975844cc9dbe1b54703319373b29a860
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE2 16976 bytes