Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee5e928e30a21e3…

MALICIOUS

PDF

112.1 KB Created: 2021-08-06 14:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 14f7abe3ba1ac05fe132acfcc40c8e12 SHA-1: 7bae1f563503ffe201541bfa99ca110f4fe62c2b SHA-256: fee5e928e30a21e38056944a61c269ec96df707d9ddcd56b514c0b3eeb5da963
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF sample contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The presence of numerous external URIs, many pointing to compromised CMS uploads and disposable hosting, indicates a link farm designed to obscure the ultimate destination and evade detection. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • 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.
  • 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://northphoenixmustangs66.com/clients/4/4b/4b49b54eec06ebba3741256e9f3e6f2b/File/satawiz.pdf In PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/vkecbf537u7b26u7ko2j35frcu/xunaparivosojinijo.pdfIn PDF document text
    • http://grandviewheightsalumni.com/clients/79364/File/19627966767.pdfIn PDF document text
    • http://pujcovnanaradi-tvarozna.cz/userfiles/files/junumiriged.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160948a130983b---kereditudukiwusalopa.pdfIn PDF document text
    • http://villabrown.it/userfiles/files/lategomubuwejupewima.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160aa834678c4d---pudujukema.pdfIn PDF document text
    • https://ratsimae.ee/media/contents/file/nimelenunadatifijodamewos.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/0nlpnb9hmerjtlbdsurejrlno8/17171799783.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/82011278336.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a91bcdef6f6---31123213392.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab49d0920d---54446990313.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/betuwek.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc22c46f92---luvab.pdfIn PDF document text
    • http://dlevitin.ru/fck_editor_files/files/68057244369.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083565abc1e4---wemelosisomufera.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606c99184d598---76000311554.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc8b823466---95367069171.pdfIn PDF document text
    • http://konferencii.org/js/ckfinder/userfiles/files/duraruwerawuposupa.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/6be2vp2luuj9abt8uioebu0tol/86629551181.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160915ad12d77c---17322689253.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3d3f76c32---11312521227.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160968777db765---pubidorozivote.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+write+a+guarantor+letter+for+a+rental+propertyPDF 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_off00014fd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FD6 19620 bytes
SHA-256: bab3755ede4007e88142259bc6cc46370845fe093068aea7e6603ecf461500ca
font_01_sfnt_off000181f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181F8 10656 bytes
SHA-256: 0040b9d13bbcfd2a2932b621be7ec60df4d557fe722452acdcf6d1ffedc58ee6
font_02_sfnt_off00019a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1