Malicious PDF — malware analysis report

Static analysis result for SHA-256 bef314729b72420d…

MALICIOUS

PDF

84.1 KB Created: 2021-09-06 02:06:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 11b6f80389ed8db13c430689fc6af749 SHA-1: 14952a107738135b01c13d7b7b7bad3cb9a33dc6 SHA-256: bef314729b72420d26352b06462b017e6e2321e2417060eecac2be10992ffe6c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and potentially disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of external URIs and link farms indicates an attempt to redirect the user to malicious external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://archism.ru/uplcv?utm_term=diamonds+are+a+girl%27s+best+friend+sheet+music+pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16079cceee8d60---81558701131.pdf
    • https://havanic.com/cache/fck_files/file/29991349670.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/74892566171299ed9bb83933b9877529/xivujozejetuleg.pdf
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/bfeee63f50923daf9100123adc7a3ceb/kidinidulabib.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7ba60250e---gopaxivopokefutunos.pdf
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/81867128f79b31d0732114aa9153f0ff/8581229541.pdf
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/f63ee40c906b615baa968565479ad136/zofololivotegavu.pdf
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/1af4f0f304f3e316f3a9d526df7fe952/55051086835.pdf
    • http://hotelbellevuepalermo.com/userfiles/files/xipugosibesaso.pdf
    • http://avsa.org/sites/default/files/images/files/kipomolu.pdf
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/n9759ei9d2l21svluivd782qqi/xiredodisajuketajalusuxo.pdf
    • https://locoffice.ru/userfiles/file/tevezolu.pdf
    • http://zxpgw.com/userfiles/file/jagijutopu.pdf
    • https://ajambary.com/userfiles/file/94987120204.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/vlfbdnaerafkvfrh1ai7dt2hhe/5392613271.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/2bdcc63a1f354da1b70c33fd75a1d7fe/soxasewitegunojuzitaba.pdf
    • http://hadt.vn/upload/files/nesuben.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f09d2872f9---sinuzi.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3823399b8---kodupetivopigabopatomux.pdf
    • https://atpl.aero/ckfinder/userfiles/files/rawefobujuvidirinojagolof.pdf
    • https://autosaloncenter.com/uploads/files/saraxadijadeb.pdf
    • http://studiorinaldibedin.eu/userfiles/files/xirovakulavuvune.pdf
    • https://klcmekatronik.com/ckfinder/userfiles/files/gekebojenadujadebul.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/746750e2a6efb5a0ecfb92ec291db959/zototokebuporipunax.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/c1pdfs5mj2je17hcph5ga2cco7/wegarawifemu.pdf
    • http://toshiteriyakiburien.com/uploads/files/xibizezaponaxu.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_off0000e3c5.bin
2c9c41643bc52c67922e6023cf52f3ee8cd01038beed8e71104599ee94e7361c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C5 17176 bytes
font_01_sfnt_off00011038.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11038 16792 bytes
font_02_sfnt_off0001284f.bin
5414a3ea38a504206b3170be1016ef90abc181f09e1b4631d6dbffb20bf81b40
pdf-font-stream PDF embedded font (sfnt) at offset 0x1284F 11344 bytes