Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0820301e16005f0…

MALICIOUS

PDF

84.8 KB Created: 2021-09-01 08:20:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 32bda235ab06c03fe1aae6e218ea0f78 SHA-1: 242e33dbddfe6cc399876271afa2018b634195f1 SHA-256: e0820301e16005f070f34684b676f2e9d5b97290b48840922c1b6328c3a1f6f6
212 Risk Score

Malware Insights

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

This PDF contains embedded JavaScript and a link farm pointing to compromised WordPress sites, indicating an attempt to trick users into downloading malicious files. The presence of a 'password-protected archive' lure further suggests an effort to bypass security controls by encrypting the payload. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/6054162eabdcbfb1c0928388bbd6236d/45590975101.pdf In PDF document text
    • http://camelliafb.com/uploads//files/202108040458346472.pdfIn PDF document text
    • http://dhs1959reunion.com/clients/871764/File/wekuzosaregimexejukoguk.pdfIn PDF document text
    • http://all-vehicle.net/js/upload/files/31315438517.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075641b5b96a---88434831563.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/9847c3f06c505068279008e7cb68f6f5/komalaruxurofawomivu.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/veteranizukinupol.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099d15a8e48f---83128618818.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/o5a86mkqgveep0hjh8bp2s76pt/33241032918.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072112a5297e---57923035490.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b49f18704b---wixesuwaketugike.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/48948061579.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608470f024818---giwekanowogumitadigizumi.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/a10f02885d5a5979dc06957d61e2d886/zaduxamup.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/pofci39iu8fllb24prolk42ce4/48580065670.pdfIn PDF document text
    • http://yilip.net/userData/board/file/tolejojasuf.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/zovazokaba.pdfIn PDF document text
    • http://ucity69.com/clients/861769/File/34195483609.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610fab4022c35---77509850258.pdfIn PDF document text
    • http://bananamusic.tw/uploads//files/202107302154404887.pdfIn PDF document text
    • http://matkinhantai.com/luutru/files/75247664329.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16103cd868d4c8---81917460335.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/9eee829403d857820b2fae875341af9d/luzosumamuvebakifawinebo.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160fe9a93c9e8e---57892992223.pdfIn PDF document text
    • http://ikoi-es.club/yamituki-n/uploads/files/fonuxojuribamizovisexi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=pdf+size+reducer+softwarePDF 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_off0000e4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fcfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFE 10568 bytes
SHA-256: ef93fc1e3f7bdb854c06e1b7ee3251b9ffc107eccf3c64edefa86e7163623769
font_02_sfnt_off0001156b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1156B 18140 bytes
SHA-256: abd0c4766935c2ba003a77d1de622219685374b7bd39d0354b8c97cd776caf56

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