Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1e0afc951b40879…

MALICIOUS

PDF

82.5 KB Created: 2021-06-27 00:00:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c08d9ace41fec013c0926eb025c1073d SHA-1: 63c8e72aad1f15cce5e9309381d00575c9b4ac74 SHA-256: e1e0afc951b4087915a0bd9dbfccb8faccbe6668d35ca8f39c95c9bc17dc02e6
96 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 5

  • 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://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608df69582757---13230218033.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/51ed15577f8199cc9068d8ad7d7cb834/kelowenafama.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/fc522bf79076132285eefcbed062ff6c/94332337184.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/dubar519ef1doegsonttcd0t3p/41605263403.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16085edd33b339---62297346462.pdf
    • http://mtecommerce.it/public/news/file/7254988036.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/de3e93bd31add510b7d06b394b23dc89/fevilaxitonewokitag.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b622f183bb5---21967649306.pdf
    • https://burstallconrad.com/editor_files/file/norubotus.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a080262ef43---fewuvamezaj.pdf
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/c58s8nvh9lpf5724harfe82f71/lemowafosoxizebom.pdf
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/57b083e69c75f3307e3f03de4abf24f1/majufigipumu.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16085c397e22fd---38416635101.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c11e8838103---81702842616.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/aa85313f3e0bc4da82faff784b3fcbbd/77034571563.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bf4df4d46c8---97630552157.pdf
    • http://coalcreekcentenary.com/clients/5/52/52f735e63eff8706e1a2a73a20aef632/File/60546559884.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a3bc7d88e3e---67995076182.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d33dc9be0c4---satixate.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f64f5f1ba---94063184085.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16072aad46c78e---77774040954.pdf
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/5d86949dd51a086f3162ce91ad03dd48/3207338060.pdf
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/555ec739d258e84f5218fd549f0c8cc7/17657018552.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdc9bde3a5---45746848454.pdf
    • https://lacecinella.com/writable/public/userfiles/file/zosokezon.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609daf206bec5---wodovixelo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=vocal+and+verbal+communication
    • 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_off0000e01e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE01E 16792 bytes
font_01_sfnt_off0000f830.bin
97770e6f0445c1fc2a80987fb65f69af5c4bac6b541585b1729142d0007a77c2
pdf-font-stream PDF embedded font (sfnt) at offset 0xF830 16592 bytes
font_02_sfnt_off000122e0.bin
837edb1bccf404eb0f230a28b5b47cbdbae37388436fd68b5d3c88063a78965a
pdf-font-stream PDF embedded font (sfnt) at offset 0x122E0 10636 bytes