Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0f8b11e9eb7f1e7…

MALICIOUS

PDF

82.0 KB Created: 2021-09-23 01:16:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b83231693e102a72ff8a72c179552eaf SHA-1: c5705ca48f435263558974afe665902b14e3c84a SHA-256: d0f8b11e9eb7f1e7e42549b06d8e934a92c3cf2fee7590a68b4679a6a9aedbbc
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links to compromised websites, suggesting an attempt to trick the user into downloading a malicious payload. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely provides instructions for accessing a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://kaies.cn/upfiles/210921104516977601iho8ts.pdf In PDF document text
    • http://gloteckr.com/upload/editor/file/5984199505.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d8ee9a28f2---76139586499.pdfIn PDF document text
    • http://crimesla.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/25083827667.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc6aa5101e---58442252773.pdfIn PDF document text
    • http://bedrucken24.de/userfiles/file/nukuzi.pdfIn PDF document text
    • http://geobigoni.it/userfiles/files/mopalewavabezisemus.pdfIn PDF document text
    • http://uralteplostroy.ru/content/file/fiwenoxag.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bfe1bf1946---31695369189.pdfIn PDF document text
    • https://magyar-logyogyasz.hu/fileok/file/fagidejilejamigadiz.pdfIn PDF document text
    • http://www.petersonassoc.com/emailimages/file/36284779656.pdfIn PDF document text
    • http://audidalys.lt/ckfinder/userfiles/files/40880763461.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/161372fc25d6ec---nenozitexazexepato.pdfIn PDF document text
    • http://mtjjt.com/2013/upload/article/files/210922231716656706ssgya.pdfIn PDF document text
    • http://naso10.com/userData/board/file/81522739793.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142d3deed777---19072423891.pdfIn PDF document text
    • http://mackyz7automotive.com/js/upload/files/20194056112.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210903155523.pdfIn PDF document text
    • http://dlugopis.kbo.pl/ckfinder/userfiles/files/40285079310.pdfIn PDF document text
    • https://nstyapi.com/resimler/files/77099155789.pdfIn PDF document text
    • https://luxm.pl/userfiles/file/wixudixogupuwinipaw.pdfIn PDF document text
    • http://gulfcoastlist.com/userfiles/file/megavapas.pdfIn PDF document text
    • http://gps-tw.com/CKEdit/upload/files/73564880023.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=password+protected+pdf+unlock+without+passwordPDF 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_off0000d9c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C1 10996 bytes
SHA-256: 5213bb0678357f85b1fb0f1477b542dba9bd92d752f5558168c4930897e5370b
font_01_sfnt_off0000f34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34F 17880 bytes
SHA-256: 026d3fece2f0b8218c09da143f8f34e384d9d9bab09a961553b4a1771e05c7d8
font_02_sfnt_off000121b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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