Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec6c2a626ce7c80a…

MALICIOUS

PDF

79.5 KB Created: 2021-09-06 14:17:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ecee8978eedba8961acea48aa332cb09 SHA-1: 61def0d75c759eddec3ba4610a76f93ad573b2d0 SHA-256: ec6c2a626ce7c80a304a28062dada2ec90b582a6fec5c0652727252a4e446f06
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to compromised websites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://jdlpartnerss.com/userfiles/file/97607216180.pdf In PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089e54b97c44---vidonafod.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/52o0h7r2mslqqv5gm9lj8ig0hg/57301099504.pdfIn PDF document text
    • https://tkquiz.com/userfiles/file/jolodazifurodawoz.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/el2rqh74ej926c39mroa3ers1d/41650679937.pdfIn PDF document text
    • http://northcity.rs/slike/files/97169698192.pdfIn PDF document text
    • http://changrung.com/ckfinder/userfiles/files/jarepabaxa.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/bf1k1jvep7akb75apg1p8dd64f/gametunasu.pdfIn PDF document text
    • http://bakoca.hu/files/file/95221028121.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/saruporezuxer.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/detipazodujavib.pdfIn PDF document text
    • http://limitlessillusion.com/wp-content/plugins/super-forms/uploads/php/files/eced5c7c1a2abf6238abf8348a109e9d/zesezixalaxu.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/84bc85bb75667b2d0d5f76072c09d84e/xogab.pdfIn PDF document text
    • http://hulstcustoms.ru/uploads/files/padakutejuzaloxoperasade.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/61189797220.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a624aa9a994---62111337370.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bf577a2110a---70519285574.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/57234135466.pdfIn PDF document text
    • https://affordans.com/ckfinder/userfiles/files/68398045088.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/gidajemav.pdfIn PDF document text
    • https://hockeymro.ca/docs/file/13542999034.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1129d42637---sufati.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/4e63d996ee7a6788945c2dcb09d01adf/91823709435.pdfIn PDF document text
    • https://livnica-metalurg.com/images/pages/file/92758513228.pdfIn PDF document text
    • http://vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/34825196222.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=piface+relay+plus+manualPDF 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_off0000d3d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D8 17260 bytes
SHA-256: 9938373565c2ddf1c1015adec98cc32eeac5e7edd0b3b5a29e301bca915e41cc
font_01_sfnt_off00010068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10068 10640 bytes
SHA-256: 6e9cd2d6671715279b61c1458dc8d1a471be2efa9a65530dcd75c617fd554664
font_02_sfnt_off000118ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1