Malicious PDF — malware analysis report

Static analysis result for SHA-256 c71ad249b8231cff…

MALICIOUS

PDF

86.0 KB Created: 2021-09-02 17:03:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c33c08a0cff1ccd8f47f512ac428d5e7 SHA-1: 7e85fcd8fdf8c3d2844cada04167a849cef7c34c SHA-256: c71ad249b8231cffcf6f43a8aa3469ad34598f7f6bd1d8784b776c1e752fd596
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many of which point to websites hosted on compromised content management systems or disposable domains, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9327

Heuristics 5

  • 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
  • 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://kingsfinancialconsulting.com/userfiles/file/10768784642.pdf In PDF document text
    • https://blugarden.eu/file/2859020129.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/af7itfli3t2j59e1oppqj9ej00/zupinugizasuteki.pdfIn PDF document text
    • http://letsbelegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bupijanig.pdfIn PDF document text
    • https://ksuskalology.com/images/file/fetanabudiditemobojof.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/pibopisetoviripedanulit.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/31996154342.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/105bf7730c29256570c31b4a8f913d8b/66674815044.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d624319f47d---52768745051.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/e2fb1e0d228bf5a7976d5d55487d4a99/25470272221.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/1238059086.pdfIn PDF document text
    • http://biswasi.com/userfiles/files/fozevagenujobulididili.pdfIn PDF document text
    • http://przystaneknida.pl/data/aktualnosci_imgs/file/wizakedojetemise.pdfIn PDF document text
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/pajiramax.pdfIn PDF document text
    • https://notarbrazda.cz/userfiles/file/In PDF document text
    • https://media-get.com/userfiles/files/powopejogonekuv.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/5b75486de60940c53394f73986bf1caf/gizomitivavadod.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/020ee3ce9ae5918b7e7814ad54665948/kojipomedef.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/90245976257.pdfIn PDF document text
    • https://eventpro-kontraktorpameran.com/uploaded/files/6858269071.pdfIn PDF document text
    • http://harckocsik.hu/userfiles/file/6328731574.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/76780198299.pdfIn PDF document text
    • http://arlingtonhigh1961.com/clients/e/ef/ef36f0800c0a5d5a0b00d5ecc8c3c6da/File/lisurexesugokip.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/76988443740.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/e86f55a1924c4b3fb5ccfa833445f3e8/4558186081.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=international+journal+of+language+and+linguistics+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BF 10976 bytes
SHA-256: b572aa8434e8672d92f41091db555e5f97d62a8e2d5d9ba51db586c7bed572e1
font_01_sfnt_off00010e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E15 19520 bytes
SHA-256: 1b81193d2eba49b8538744cc850ac3b0cd65242492f026e2fcaeddac5de35e2c
font_02_sfnt_off000140ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1