Malicious PDF — malware analysis report

Static analysis result for SHA-256 c06792301b5ac203…

MALICIOUS

PDF

80.3 KB Created: 2021-09-17 21:46:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 98d98b84fa777fcac7bed0e3a2bc5d30 SHA-1: d76b1de287b9a7897df0ccf2b1d91cc535426e0f SHA-256: c06792301b5ac2033070097179e22ec1e4f193064c346f985836989a4d3a4b54
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress sites, suggesting a link farm designed for phishing or malware distribution. The presence of a 'resident evil 7 download apk' UTM term in one URL indicates a lure to trick users into visiting potentially malicious sites. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://catamma.ru/uplcv?utm_term=resident+evil+7+download+apk PDF link annotation
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/nebnu8cl8l54arvblot9gcgmd1/23862546585.pdfIn PDF document text
    • http://halongbaycruises.org/upload/files/25322181083.pdfIn PDF document text
    • https://asesoriagade.com/app/webroot/files/files/nopip.pdfIn PDF document text
    • https://sushixusa.com/userfiles/files/39421319751.pdfIn PDF document text
    • http://gyogytornasz.hu/editor_up/bafera.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136d353f0f17---datizeja.pdfIn PDF document text
    • http://unityproductions.com/upload/files/22948105223.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/sukufow.pdfIn PDF document text
    • https://maria-galland.ru/files/file/butavutevi.pdfIn PDF document text
    • http://bangiyaparishadtoronto.ca/bpt/editor/uploadfiles/4108103844.pdfIn PDF document text
    • http://ckudzcssffhhj.handysociality.com/upload/files/titizapakutuvulejuk.pdfIn PDF document text
    • http://yearbookplus.com/uploads/ckfinder/files/piwiloledelidorizodupu.pdfIn PDF document text
    • https://icrs-as.com/userfiles/file/78270639855.pdfIn PDF document text
    • https://soechi.com/userfiles/file/zajawaw.pdfIn PDF document text
    • http://krajinar.cz/soubory/files/81356957545.pdfIn PDF document text
    • http://loadcell.vn/Images_upload/files/nufejowalonil.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eedf0f4124---38524504573.pdfIn PDF document text
    • http://wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/58495440952.pdfIn PDF document text
    • http://avvocatogiuliani.it/userfiles/files/jarajumefod.pdfIn PDF document text
    • http://bacsionline.net/userfiles/file/kukubegogubix.pdfIn PDF document text
    • http://lrm.mcdonalds.ua/ckfinder/userfiles/files/45119444269.pdfIn PDF document text
    • http://mawaevents.com/uploads/file/kezomixa.pdfIn PDF document text
    • https://solelane.com/ckfinder/userfiles/files/40266588369.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5461436fa---99834174460.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_off0000d361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD361 18088 bytes
SHA-256: d7015d70ebf9f9dbcd5ba8fc653ce0f89307e7eec632cbb2676e24aa823ce85f
font_01_sfnt_off00010284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10284 10624 bytes
SHA-256: 38baca62b83c87d43b8380e7b63039d8949fc04dae56d2f33199a4bbeb739ea0
font_02_sfnt_off00011b11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1