Malicious PDF — malware analysis report

Static analysis result for SHA-256 949361e6696e878d…

MALICIOUS

PDF

78.3 KB Created: 2021-08-22 00:27:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8488a300962926b6fe8a88b382328e9e SHA-1: 3b7d35408dfadfd73185075d4ee45c5941995fea SHA-256: 949361e6696e878d892c29e502c8ff19b88da655d61f5208c1f89e077d6d56ca
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded JavaScript stream and multiple URLs pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the download or execution of a secondary payload, while the link farm aims to obscure the true destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed5d911de6---dekuwezavawi.pdf In PDF document text
    • http://royalgroup.at/tmp/23053376240.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/42940175208.pdfIn PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/dudozagilifiruxir.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a29a6d38ebf---86488153978.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/38003490740.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/31c12893d50b514187ffb890d3a8edd7/42826680331.pdfIn PDF document text
    • https://libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/noronadunupowa.pdfIn PDF document text
    • http://africa-emergence2019.com/userfiles/file/siwarazuditutanefizuk.pdfIn PDF document text
    • http://chronicles.ae/userfiles/files/15946886656.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee8c67c22c7---33383510308.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/63735884741.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/6847226560e0af17a93bf9d671f01c00/tufebovulefizitul.pdfIn PDF document text
    • https://moraure.net/js/ckfinder/userfiles/files/xameluj.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/28683273031.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/n0ikmumltlpussrgd6hu9t03q1/99867022083.pdfIn PDF document text
    • http://gtshotel.it/images/file/27839068423.pdfIn PDF document text
    • http://fruitvita.com/files/files/37815063422.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/7iu5ean4bl17nn879d6j0j5nc2/novidumo.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609d7d3abc53f---gifitewusazaz.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/d6e8520a96c9a65e3f523f07ac63fa0d/lojawufedunatuxetomuwi.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/dilepiba.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xowesuxizute.pdfIn PDF document text
    • http://hchs1972.com/clients/2/2c/2cb73362227bcfbd3ed6ae01b5b3dc46/File/xirizefe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=convertitore+da+word+a+pdf+download+gratis+italianoPDF 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_off0000ce32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE32 17088 bytes
SHA-256: dab1918ca9a58077d77aa08e3af4ed6b36e97cb8101c45dd65b4a0a9d9c39b43
font_01_sfnt_off0000f971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF971 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11188 10856 bytes
SHA-256: 3b2dbbd28fba698f8191e4491e6fccc7883b16b627acf573fb1e17aa7a93d32e