Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b084894ad47b6ed…

MALICIOUS

PDF

87.7 KB Created: 2021-09-04 02:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d048d4a8c24fea7d6a59dd7ab3a91acc SHA-1: 521b669a16094b66744140249e2830f8d7d46b0c SHA-256: 8b084894ad47b6ed649194e1427917f188a03dc66c1cdb5f805253fd94ea78fa
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links pointing to compromised websites, suggesting it is used to redirect users to malicious content. The presence of a link farm on disposable hosting further supports its role in phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://www.supremecaravans.com.au/application/third_party/ckfinder/userfiles/files/40579359805.pdf In PDF document text
    • http://driver-jazda.pl/upload/file/jefatilaje.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941fcb55e06---pebukijevonu.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/796a0d4969632ff56e3f109226f22c3a/81522807468.pdfIn PDF document text
    • http://fxmeat.com/upload/file/3984081ea16e2564405ae18cbfcd7408.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160740340d3214---20427266429.pdfIn PDF document text
    • https://abcoegypt.com/userfiles/files/lawaxifelikamisaxowil.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/bafavaginikosobabemo.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/dc6f161cff2439ef4d53241df6501007/75288620541.pdfIn PDF document text
    • http://avandcie-automation.com/ckfinder/userfiles/files/mulaximebumizizabasil.pdfIn PDF document text
    • http://ressourcengarten.de/azubi/userfiles/files/7560159749.pdfIn PDF document text
    • http://plymouth-logs.co.uk/ckfinder/userfiles/files/88105974612.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/92122432367.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/jiliwa.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc24d781a3a---vedavidoxorulubosop.pdfIn PDF document text
    • https://karpzbeldowa.pl/uploads/userfiles/files/59705637523.pdfIn PDF document text
    • http://cooper1972.com/clients/b/b4/b451ebb09e7e0345645526f893d9a49e/File/73768498942.pdfIn PDF document text
    • https://ahl2005.com/ckfinder/userfiles/files/pakutudu.pdfIn PDF document text
    • http://dryoucosmeceutical.com/userfiles/files/41789149373.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/3485e0b87977647c97e50cdc71c414ed/20035831748.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/e79c5873d1677ce3515cad7615ac17f9/20267619082.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/id6n97ur1r1nujatoa70odggnl/xerixapanedoziv.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/52691767766.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=bamford+classification+of+stroke+pdfPDF 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_off0000f053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF053 18236 bytes
SHA-256: 84d4ef06b8444cbbf349e4b4f4fd520536d8bb4dac5901f3b4707790123e55ba
font_01_sfnt_off00011fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAE 10928 bytes
SHA-256: 30b5ba9a35ac00017d24899e41f915b7df31d8a7d3ccb2b4044482f442a292b2
font_02_sfnt_off000138fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1