Malicious PDF — malware analysis report

Static analysis result for SHA-256 241de1f0f9c26dd4…

MALICIOUS

PDF

87.0 KB Created: 2021-06-27 11:12:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: b86cfd93b2a3726da6e2bfd26ab455de SHA-1: 5abd14c1bab8ddb0c471654845da20464313f69b SHA-256: 241de1f0f9c26dd47c776cf8e86f6d8d89473d13d47a99ed731b69ab007d8cb6
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to WordPress sites utilizing form plugins for file uploads, suggesting a link farm or a distribution point for further malicious content. The presence of multiple distinct hosts and the nature of the URLs indicate a coordinated effort to host or redirect to potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/3a56f5f06feb429fd9c777cc4c315b42/beviwejetimobifaris.pdf In PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a743f517375---nagexok.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871855f3c6c---rigevit.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/fqds7266bgtcds5thpqnk186ta/filew.pdfIn PDF document text
    • http://nktrading.qa/file/files/13263406786.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/53146293082.pdfIn PDF document text
    • http://lnaixi.com/userfiles/file/20210618220639_1123290619.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/e87ee7719b748564e121556247ad1853/gasezoxi.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/90317282464.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/56336641064.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c761cb060a---49247178428.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/b82401de1691820fc271f887827fb6f9/91833102888.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/d9ib6tvlf380dmtco3qi8qpbs4/lumudetopoxukasi.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083eb7b30634---78633893150.pdfIn PDF document text
    • http://enidbtwcreunion.com/clients/5/52/52e94d62e82ff66504c7d921fc07bf70/File/10058534089.pdfIn PDF document text
    • http://horlickhigh61.com/clients/a/ab/ab3fb267cc30d45b98f460a20cee0b8d/File/gesewudixovikowix.pdfIn PDF document text
    • http://www.petercar0937494634.com/upload/img/files/35468092976.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb91e62527---fegujunozetawawoluloxid.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/99537805324.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/09c18284032ed6de079f71da76a81503/lirubinarigugu.pdfIn PDF document text
    • http://debsluxe.com/clients/1/17/174397649ed9f07baa8f9d9f48c72a4d/File/56991440186.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/10998683176.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/25020296384.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/846c73fced4f75055ef65f466f51bb92/13046717975.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/nnkf7gj368qgti9ou1h6plclkk/48564205728.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=macroeconomics+is+the+theory+ofPDF 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_off0000f372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF372 16540 bytes
SHA-256: 558b4609a6e0142fd26a4ae0249933b073e665d5455b68d95d00e5f04ee6ccb0
font_01_sfnt_off00011e38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E38 10664 bytes
SHA-256: 2bab64c47c65159f7a77996d09ee3d15a8874850ad56645f8d067d6b88776844
font_02_sfnt_off00013681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13681 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1