Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc5168c31d15727a…

MALICIOUS

PDF

78.0 KB Created: 2021-09-03 06:36:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ea1fa290901c873c7b1f11fa3f1c969b SHA-1: 0a702caa2d6c469c59d479b75c9de29a3be532db SHA-256: fc5168c31d15727a328dd28d10d36205ab55bece2774fa990a52b22daeff8b4b
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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 http://scsytech.com/upload/files/24271243511.pdf In PDF document text
    • https://thehero88vip.com/ckfinder/images_store/files/76223512895.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/df8570d1bee8c61cd6a76ef9e7c7ce0d/16196806038.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/26166609084.pdfIn PDF document text
    • http://xoblates.com/clients/e/e0/e08cfb93fb97b00c28394d0532709dc9/File/27482739800.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/0c26be3c513c412bf04952cee9c59dfa/xuxosapagugeduwuwa.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/23577078090.pdfIn PDF document text
    • https://hantverksakuten.se/ckfinder/userfiles/files/15259583191.pdfIn PDF document text
    • http://thecreditcrisis.net/clients/73966/File/34775374869.pdfIn PDF document text
    • https://coil.hk/upload/files/wurekesikel.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/e5b2ec46af71456a3787860eea14695d/56095550689.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/2f5b52e2f2fdc87a085b84d14a599037/18164361192.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16089b28d62c2f---66693504909.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc4a26ac24---wivetazenovibiwa.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/881b3213f46bc077fa69aadd029ba04e/50912495646.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/a438847eccfb44f9449317e96d8e28be/45137837922.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/2d44495d5d60e452e94c8dbd31b3ad58/76089899338.pdfIn PDF document text
    • http://onelove.cz/file/67053271072.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/gimupawexemitorosidaro.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/7ss5gpaubjgdffsfdhlt2ek08l/73356490680.pdfIn PDF document text
    • http://ledins.lv/cms/file/baxulelegagodep.pdfIn PDF document text
    • http://ingatlantv.tv/userfiles/files/73046663296.pdfIn PDF document text
    • https://roc.mn/uploads/files/begimatawawinifolafubeg.pdfIn PDF document text
    • https://www.jancsoalapitvany.hu/ckfinder/userfiles/files/72720528674.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/imisgrbcogm4gsi4qhgkcvjr4h/18641976479.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=11+class+chemistry+book+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000c5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E3 19728 bytes
SHA-256: cc2816ad8c7a4b91a6236ef34e3fe2a2e1e98e44ce3b065baf3f97ddd2038bbf
font_01_sfnt_off0000f812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF812 11084 bytes
SHA-256: 46583e6e7859feab2be6a4af18d007983ad837b90f8dade4a5d16d2b3e390d14
font_02_sfnt_off000111c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1