Malicious PDF — malware analysis report

Static analysis result for SHA-256 a49b2007e4b20c8b…

MALICIOUS

PDF

68.8 KB Created: 2021-10-01 19:14:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2da8003ba87c4b12d03d93e3c3cabb5b SHA-1: 409aeab732ded20e05e14c54a0713e3a0b77b1dc SHA-256: a49b2007e4b20c8bf3e99c18598ad9784abec35e10ec20f9de39c50e936135cc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The URL 'https://krisoc.ru/uplcv?utm_term=office+2018+crack' suggests a lure for cracked software, which is a common phishing tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a secondary payload or lead to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://krisoc.ru/uplcv?utm_term=office+2018+crack
    • http://fullcolorspandoeken.nl/userfiles/file/gulopijorogidaz.pdf
    • https://jpt.mysmartedu.com/uploadimages/files/68311374097.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613614dab18cb---199753019.pdf
    • https://granitnet.hu/editor_up/5918519342.pdf
    • http://soncongnghiepjotun.com/media/ftp/file/zusuron.pdf
    • https://kham.vn/userfiles/file/muguda.pdf
    • http://awarelaxcentrum.cz/user_files/file/42577347773.pdf
    • http://aalzkj.love-mrt.com/upload/files/60196444380.pdf
    • http://turbotechnik24.de/userfiles/file/61381574733.pdf
    • http://intrinhgia.com/admin/webroot/upload/image/files/70396257509.pdf
    • http://yuqiaohome.com/uploads/files/202109300214229643.pdf
    • http://kengosushionlineorder.com/uploads/files/danejuloxa.pdf
    • https://novsport.com/content/File/20980592124.pdf
    • http://gomientrung.vn/uploads/image/files/zorafexipeduxatizew.pdf
    • https://www.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/jozel.pdf
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1614dcd2329ece---54833281125.pdf
    • https://ehotelgateway.com/bot/ckfinder/uf/files/67512669050.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/161409fcd1f9e6---56670341273.pdf
    • http://petraifevronii.ru/ckfinder/userfiles/files/48450389893.pdf
    • http://rts-3.ru/upload/files/24484084561.pdf
    • http://walosports.cl/userfiles/file/87869026406.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/161540b9139712---xutibudedisopevozibapeni.pdf
    • http://xn--9i1b14l32gg2dsybq3b.com/upload/fckeditor/file/tudanebe.pdf
    • 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_off0000b0fe.bin
174d6f9e1996d439b64db9ad703434c46a5471cd5fe60b998e77f34fc00e7042		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0FE 14560 bytes
font_01_sfnt_off0000d5f5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F5 16792 bytes
font_02_sfnt_off0000ee0c.bin
a89af61caa002972f721a9a25fd376252551e267e6a1918ee9ca78db7da4cd82		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0C 10412 bytes

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