Malicious PDF — malware analysis report

Static analysis result for SHA-256 f14836f9215b7522…

MALICIOUS

PDF

63.5 KB Created: 2021-05-12 03:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aea63d7fa9c760b1f10c8420ed2993bb SHA-1: 1e1a7e0fbfa674659c11f0197156affb734c11c2 SHA-256: f14836f9215b7522814394d4208b5ed802b12a3861062ccae52e6e9ff0a925bd
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, likely serving as a distribution point for phishing or malware. The presence of multiple links on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9531

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 https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/942af4e650225d5a2204260bae245895/taduzekugo.pdf
    • http://www.doctor-carpet.com/wp-content/plugins/super-forms/uploads/php/files/qoqvreqrpftleggr5hu3k1k684/89516268731.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/566abcab6d503fe51b5898f90a507e7f/vonofed.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/41b9fdf1c5ad8a069efa0f7109993d26/40938897090.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608390d6c06cf---kirulovimagivim.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd1ac5464a---fisapezomulig.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f41a3b38d---dibadowedisekeberakelebi.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160829155aecfc---97176707368.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096c6da0745e---44619975992.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/06f578fb931a3e0e5b78bf6e4026b4a1/51531623652.pdf
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/4cnua4ss1f12upeamk6lj4ot2a/3841352828.pdf
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9ceaa37c2---77620842235.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/cc1a3a90d229cebf4cfd92f8a6f7d8ea/xukonuxuvedewemare.pdf
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/c2500482580e0e2bd727058176e7af36/liwefaro.pdf
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/qqb91d3kk42q8fpjgctif62i2i/kebimakozabetotoporizuja.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=french+subjunctive+practice+worksheets
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0ae.bin
3e4acc952965b34a3ec9da24717f1fcb8e5aed5d3df6bce04956de5a1890861d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AE 5376 bytes
font_01_sfnt_off0000e2ff.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FF 1800 bytes

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