Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cedbf033328078f…

MALICIOUS

PDF

91.4 KB Created: 2021-07-07 21:30:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2d9e48196a364601133a51abaef3b010 SHA-1: 35b6b14d5d3f8db7cd704b6ba94de90126e98486 SHA-256: 9cedbf033328078fb3ee3b3e73d6eb01d53026dcd5b4bee9a32cacf608f3a46c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external URLs, some of which are hosted on compromised CMS uploads. The presence of these links suggests an attempt to lure users to malicious sites for phishing or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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.
  • 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://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/45b581c79396232d19c6b06aeed31a63/8439252870.pdf
    • http://hoangminhphatkorea.com/webroot/img/files/jilarisiwisepamafe.pdf
    • http://banglatalkies.com/dynamic-images/cms/file/fiwusujiditulosofosenoxir.pdf
    • http://studiotecnicoarduini.eu/userfiles/files/64773435858.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/1sloq0at0r3t8rithcqr3mlegr/65852552910.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099860bf34b4---wapaxa.pdf
    • http://esipro.fr/userfiles/file/99855921213.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b7a7d16a7---jivavarojogikimed.pdf
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16070155d47f2a---64222887120.pdf
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105161747415160.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c07cb5a3aab---71922453988.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7724d1e24---88570566122.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e5be8b800---roren.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a85aafb2661---64562155918.pdf
    • http://verduciautodemolizioni.it/userfiles/file/50752501683.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160da9092c5479---jivakatob.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb4f237a6a---bugaj.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/3c182926d146a68661c31d8bfd44ef0a/bonotijimuwesemugalu.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16082eb234b72c---18537990534.pdf
    • http://allamericannursing.com/userfiles/file/popudojesolirokegilizi.pdf
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/701f23e7deb2ac4bbaf296c801217086/sunixarasazerijulukevut.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160d048a90d0f7---towavave.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8b2e3e590---rilabimudevu.pdf
    • https://anukulagrotech.com/userfiles/file/polanirudalerowumaletu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=children%27s+liturgy+of+the+word+lesson+plans
    • 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_off0000fd86.bin
c713e4264e69442d098af94e3f7f4151c1bbf81bb38d55347ee836ec8eaced5e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD86 17800 bytes
font_01_sfnt_off00012c00.bin
ef07bc5480b28800172b77674f1e8628a23ef7b116f61429afb468a6124aa6fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C00 11140 bytes
font_02_sfnt_off000145e8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x145E8 16792 bytes