Malicious PDF — malware analysis report

Static analysis result for SHA-256 d399e84f6f6c8229…

MALICIOUS

PDF

72.3 KB Created: 2021-06-14 03:38:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1a1446499611c467594945a4fe782f0b SHA-1: 5d8f91c7cb6f90af26cc9a017c8cd9f7ef01990a SHA-256: d399e84f6f6c8229b956b6c4341b4dbc7784f4bba4bd75a0a5f3d5806d9a79fe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content. The document body, though heavily obfuscated, contains metadata related to 'wheel of fortune ppt template free', likely a lure to entice users to click the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://philabc.ru/uplcv?utm_term=wheel+of+fortune+ppt+template+free PDF link annotation
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/46dd8f7bd75cb7ef4f8a0c276dd06e84/rikusalixukawo.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/64237691905.pdfIn PDF document text
    • http://heureka-cz.eu/files/ditulariladunekekaxi.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed41ddf40b---gudirugiledat.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c182e1df7aa---magizare.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/43002555358.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/fk1ok385v4kukcsui4m3s74ekl/fadegomemolofixor.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090a2af0eb5a---rakigumumivubofewovike.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/pftoca1upguiepiab656irjja6/gelop.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/c7tk501j4o7m3rjgqana935ut6/45106003840.pdfIn PDF document text
    • https://vpntraffic.com/upload/files/vajarifif.pdfIn PDF document text
    • http://bannails.com/fckeditor_userfiles/file/26314918531.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/72901808029.pdfIn PDF document text
    • https://agermag.ro/mm/file/88862442122.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/kuzevisuneruworenasipef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC8 4976 bytes
SHA-256: 7f08f8a9e167820654733b2c4a64c8fed89e603e1c3bc51ae5ca3881c3dc9135
font_01_sfnt_off0000ef94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF94 10820 bytes
SHA-256: 3dda296facbfc5164fbeefd75764c0cd8e6a55aeaf8bc11b1cab72c13a22d77a

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