Malicious PDF — malware analysis report

Static analysis result for SHA-256 006fc856c4299e79…

MALICIOUS

PDF

96.1 KB Created: 2021-06-28 00:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fdc16115373dc6f17f8dd81680b403fa SHA-1: c6b688a05d317de95182ca45a9a0d5f1d7eb90bd SHA-256: 006fc856c4299e797e53a57ca05e5155d7fc093cadb5cf15da25589d1eb965ed
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these external links. No scripts were extracted, so the primary attack vector is the redirection to malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://asijskepotraviny.cz/files/file/gapaviwagudegojuparuxev.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/36c94f5c0ec4aabb0b3afc73a614b307/jamebezifav.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/9360e57c22fbc3beddd0fbd21d5f1dfe/mamigaxajovi.pdf
    • https://bednidhitraders.com/userfiles/file/vudakijuna.pdf
    • https://dcoderesearch.com/uploads/maramenigekedusiveroz.pdf
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/230486e0dbe8ebfceb423cc6a38cc6bb/redomegoso.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c908bd9445---lemovo.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a3f12c193---45229830209.pdf
    • https://aspirans.com/files/file/xomotituvurumadaw.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/39f6c17c55568ad579561a2d213d802c/pexaxanegaziporefuf.pdf
    • https://clubforeducation.com/FCKeditor/userfiles/file/46364122284.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609db7bf04ce9---63032240355.pdf
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/vilekudes.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160899ab58cbeb---34540224733.pdf
    • https://malashealthcare.com/userfiles/files/simisokijafiralekozot.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/7lqismn9hk82745o03drb7d444/betedule.pdf
    • http://dansensvenner.dk/imagesfile///zutunefuropuvuvotikotojul.pdf
    • https://citronixdeflection.com/nbloom/fckuploads/file/21386714402.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/b80629706950b75291246a094db68167/sorimoxulojitup.pdf
    • http://cjandjunemillerfarm.com/clients/75830/File/80464196822.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16086813ae00ee---6143233256.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=mount+mitchell+observation+tower
    • 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_off0001122a.bin
75872360d73aca8c07a8b3db1feb83e35ff2d73043421c9c27465bd313587180
pdf-font-stream PDF embedded font (sfnt) at offset 0x1122A 17752 bytes
font_01_sfnt_off0001408a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1408A 16792 bytes
font_02_sfnt_off000158a1.bin
cf359cf85ae4a38ca2ae55142ab6a15e2067e3009e7c84e8b1208895b69a09d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x158A1 10880 bytes