Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d319cc61f2e8967…

MALICIOUS

PDF

96.5 KB Created: 2021-07-07 09:52:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 11e5cb3ee8fce4cd9ca6413ea189250b SHA-1: 2007c99867673ac09fcff319690ebcaebc960927 SHA-256: 0d319cc61f2e896705d481f0b727a7c907321b33db7285211e42977dc85bd651
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of external links, many pointing to compromised WordPress uploads and disposable hosting, indicating a link farm designed to obscure the final destination. The presence of embedded JavaScript and a high ML classifier score further support its malicious nature. ClamAV also detected it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/a8994fdf399e7b38a36ebef1309a4908/lebimobidosa.pdf In PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160e4ec1b1fa27---bejejipufukatis.pdfIn PDF document text
    • https://12tiga.com/contents//files/gajotasomotagelalovu.pdfIn PDF document text
    • http://www.heksan.com.pl/file/ramoxogitosuwagim.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099ca56b91e7---jisar.pdfIn PDF document text
    • http://littlepearlspublishing.in/data/eimages/file/xolifodovesoso.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb0218c8d8---bapamag.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c451aa4f46a---43477545688.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/61ca0ff0e6f9b227a1c5bd96af83bf5c/34647021127.pdfIn PDF document text
    • http://viacaosaopedro.com/www/js/ckfinder/userfiles/files/38445154683.pdfIn PDF document text
    • http://berbun.com/user_img/file/40328780130.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/246b973cb9215270bfb4b9fe632f5483/gowogo.pdfIn PDF document text
    • http://www.odnpoznan.pl/fotki/file/file/79103756224.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/93376595819.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/8b9b0714ee9691739e4599fb11419510/wuvavawevepugejeli.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b3940062d---sawefunurut.pdfIn PDF document text
    • http://thaoduocquyhiem.com/userfiles/image/file/73585274997.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/panh97b7el26slrs2brtje7dl9/visabojanurusobotuk.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095f8e8942ce---65361341562.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/62216c9cdfcd285f8d65b5cdc50f401e/gibor.pdfIn PDF document text
    • http://julianowka.pl/ckfinder/userfiles/files/desilexulafurovagoxel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=dear+god+i+want+to+thank+youPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF887 1692 bytes
SHA-256: 6df00093d1a1fd8b8f95901b42ba2863538c90606311dd4adf1993a433792d13
font_01_sfnt_off0001008f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A1 17240 bytes
SHA-256: 164046ef37a7f0b07f5dfe3fbf5d2142dd201e5417bef1c18539ab6507cea5b0
font_03_sfnt_off0001448a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1448A 10704 bytes
SHA-256: dcadab86ea8123d326e615300e217fba5993e0b35fc4cd2fc90d9a8841aeb6c5
font_04_sfnt_off00015ce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CE1 16160 bytes
SHA-256: 27fa49ca30b1f57c6e4f8b99ad1f73ead7010ce1f191e20d716503af09158f46