Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ea0c9fecc53f8e…

MALICIOUS

PDF

93.7 KB Created: 2021-07-23 22:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 20b9aa237c78e797e35263e39676228f SHA-1: f8b721d8e7144e10c5f771acf1b0e2e8f470b012 SHA-256: 07ea0c9fecc53f8e4d04a269964e6fbea098ff745c957871bec6635ab3609b02
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS uploads or disposable hosting. The embedded URLs suggest an attempt to redirect users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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://rubyyadav.com/nbloom/fckuploads/file/fekale.pdf
    • http://deborahkay.com/ckfinder/userfiles/files/18778095517.pdf
    • https://nenanhduong.vn/Upload/files/nutexufamoriraxazi.pdf
    • http://seventyfirstclassof69.com/clients/60772/File/diloruv.pdf
    • http://kleiberit.ru/files/file/67079547877.pdf
    • https://rugerwafers.com/demo/ruger/beta/userfiles/files/82765531757.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/7ab331294b47395157bf82850feebf09/85196720179.pdf
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/bb0fe4cbbe36f4285e726a994725c988/25634190973.pdf
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609f755104012---21520829607.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/529a7e5c72b1bad6a7591f4540e009fe/fesebe.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607761f7227dd---29241158420.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/9420ea5a808f38b19993f5fef3d0a662/selofukiwa.pdf
    • http://studiospazioambiente.it/userfiles/files/88193340177.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7133e0264bbf83281b4794ccc57b7d9b/kebefijaginom.pdf
    • http://fipjp.com/userfiles/file/xamoliwunasojorumetugot.pdf
    • https://lecachet.fr/docs/files/kotirobedagogevedemo.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c310bf3f3de---6671847523.pdf
    • https://qualitymattressfactory.com/admin/userfiles/file/zazajaxabolevarubewu.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d029f0d70e6---80319646772.pdf
    • http://polyacer-ecp.com/userfiles/files/20210718_111809.pdf
    • https://ludifrance.fr/userfiles/file/jexozeditizowidetibi.pdf
    • http://musiclivemarsala.com/userfiles/files/kibitogenala.pdf
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/72249956076.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160700eb6dc5fa---92289494811.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/rij2t672p2ts1p94ddo1hjh1d6/rakumozatelefitotidopu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=118+elements+and+their+symbols+in+marathi
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2ae.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AE 16792 bytes
font_01_sfnt_off00010abf.bin
f2666e95f4599b990980a0abf2f374fe3006e34437484733904d739abeeb93bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABF 16228 bytes
font_02_sfnt_off000120a4.bin
ee8c910c30841f7033b095560f74b6c255b9423e7a69a93f278e21cf92bd0a18
pdf-font-stream PDF embedded font (sfnt) at offset 0x120A4 10932 bytes
font_03_sfnt_off000139c1.bin
654cd025a37ac4d57cbf6bb87ce6e13b415b5a9b8eabb2e2ebb4c7e2a0f32111
pdf-font-stream PDF embedded font (sfnt) at offset 0x139C1 17216 bytes