Malicious PDF — malware analysis report

Static analysis result for SHA-256 e568ed777a0d3021…

MALICIOUS

PDF

84.5 KB Created: 2021-09-07 23:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3d224fb96551e99acce74dd294ecaf66 SHA-1: 37343563309da41d8b89ca807e878e8d7490a1cf SHA-256: e568ed777a0d302179c3b46d72112500829bea008ca235a4cb6c05b2d49271b8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm, likely designed to redirect users to phishing sites or download further malware. The presence of compromised CMS upload links further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://smidgel.ru/uplcv?utm_term=wyspa+tajemnic+ksi%C4%85%C5%BCka+pdf PDF link annotation
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/7fe17ad9e2f45f407a54db1c8dc174ae/woxiliwubu.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608396d386cda---72638313712.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a4af3d03a29---xemexoxeve.pdfIn PDF document text
    • http://hoacanh.net/luutru/files/28069603889.pdfIn PDF document text
    • http://www.retorika-zidar.si/ckfinder/ckeditor_uploaded_files/files/38683053598.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/4u1pu8sghakoncdhu30t31cbb8/56640291097.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/69527042497.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210816180024.pdfIn PDF document text
    • http://www.stadion-zarya.ru/ckfinder/userfiles/files/kebafafamevisikanajizawib.pdfIn PDF document text
    • http://tebsc.com/clients/84181/File/fetesagujozeza.pdfIn PDF document text
    • http://nhahanghienminh68.com/upload/files/dijabagewuwateruxelevuge.pdfIn PDF document text
    • http://fabriziocar.it/userfiles/files/69460087578.pdfIn PDF document text
    • https://himanshikitchen.info/viking1/uploads/files/37661375527.pdfIn PDF document text
    • http://bigandtallking.com/userfiles/file/42097080055.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/1328244d5fcb129b5c64a5e6a8edc845/mabozadaxonowozinowef.pdfIn PDF document text
    • http://jrjohnsonfamilyreunion.com/clients/0/09/090f04f22b165063c0e57546eb93b169/File/61191900773.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b568940ce2e---nuregaxu.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/kamkncpfknfmjqu9ce904phss4/8637318044.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d7c895f34---zetifevomanijosavuvejam.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081919e5e1dc---wedikedigujulikoxuwo.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609096f8e85d0---71301155003.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1610bcef2a40fe---rojebep.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f266431b0a---78886066704.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/eb554b48157756283b42ec3857c724dc/11810330417.pdfIn PDF document text
    • 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_off0000e14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14C 18716 bytes
SHA-256: bfa850ca74dcf1e707969c40c0f63b2ad668ea365346c00388c07df60b2300cb
font_01_sfnt_off00011060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11060 11188 bytes
SHA-256: 323061f7d1e6b97eab7800b722e6ece3d0b3eb5755ed159982fe3d486260b373
font_02_sfnt_off00012a3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.