Malicious PDF — malware analysis report

Static analysis result for SHA-256 782c3840d815a596…

MALICIOUS

PDF

74.9 KB Created: 2021-06-21 12:27:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7da8b25ead7368d012f73eba2e679fa0 SHA-1: 7701973c22f648dd579df33d5f88a547b7d4c359 SHA-256: 782c3840d815a596a08549653257aeba02c7335df011e99007d203c4b38f10a1
156 Risk Score

Malware Insights

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

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file contains numerous links pointing to compromised websites, suggesting it functions as a lure to redirect users to potentially harmful content. The presence of external URIs and link farms on disposable hosting further supports its role in a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/8c78e8d0ae362b88f9e002fb1cb11440/pasobalomumezala.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/c2c030bda3ed55a7ac705be05a7210be/gekuwuvimuwakopujedilale.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/8bee4fbc9ff9244b34cc5b85d39e7068/fodujolelob.pdf
    • https://canevastoilestjean.com/upload/editor/file/46974494180.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c731dc8e2b---86626276296.pdf
    • http://atenngo.com/admin/sites/site/documents/somajukine.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16076a3dc59c33---85318802265.pdf
    • http://bhttourist.com/upload/fckimagesfile/50383852240.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc9b9e2495---39921002162.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607dcb3017db2---50058120085.pdf
    • http://marketherballize.com/ckfinder/userfiles/files/dirid.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721d7901dd1---nutezemi.pdf
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/c0c29bde7041433f298529e141146ca8/fasajobiselogipajeres.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861fd6939df---wupib.pdf
    • http://chayka-svg.ru/files/47704242261.pdf
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca8ab18d3c---tipadoposotebomo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=reading+comprehension+test+with+answers+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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e84a.bin
0e8c9381461cfd4992c89e0ae5a592408dcc2603a77f12b71c1688349fd5e8a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE84A 5636 bytes
font_01_sfnt_off0000fb6a.bin
c5048f189ef319c9e7b02f3428ed0f18abf1de55dfe014872c80145806c63254		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6A 10236 bytes

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