Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4eb752a30551750…

MALICIOUS

PDF

84.2 KB Created: 2021-09-04 20:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e3c08798cf09b1eb250215c75b558838 SHA-1: bcafc5aa7bfc87fd34fd5dbb1353b3e498ab8a3e SHA-256: f4eb752a30551750ff105f30afdc949dee9a07914e9844e90fd48e1d5f73066b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the ClamAV detection of 'Pdf.Phishing.Trojan' indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://brightwayconsultancyservices.com/userfiles/file/xeloloxanetopikoboxu.pdf In PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609af73f5c411---vubevemima.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f2d1e4b82---moraruta.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161335f4b1f4d3---falewowogonebunoxa.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/6aad6fde008ad022886b7752a0669124/vejuzewafaj.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/bufupamovalezimugasago.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610464a1da62d---vufenedekugemereg.pdfIn PDF document text
    • http://opgzvh.hr/upload/file/17093503033.pdfIn PDF document text
    • http://doanekeyes.com/userfiles/docs/fumizobagileporolonigige.pdfIn PDF document text
    • http://www.dr.schure.net/ckfinder/userfiles/files/11400748456.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/39a42881ac5284e7eff9def4897330e9/46337588520.pdfIn PDF document text
    • http://fbchitchcock.org/clients/8/8b/8bdff38a390027835eb24981312b950c/File/28875195014.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/64d61b712372f76833066f8d779140df/boxisojilufejebabupodogen.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944fdd94a6b---89550769820.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/f9i2ug5spcubqcjvug455f90v7/92882511092.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/3ba46c3dffecc30baed03cbab9de47a6/goniwevafeduvexogijuzoz.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/giginorisorikizarit.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6b7d81ddd---kekarowokix.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/wejeradobelabidixupex.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610891431c871---27208125010.pdfIn PDF document text
    • http://15881588.com/ckupload/files/90614332452.pdfIn PDF document text
    • https://www.totspotdaynursery.co.uk/ckfinder/userfiles/files/xupodemawezukaruk.pdfIn PDF document text
    • https://vas-vill.hu/userfiles/file/98980658545.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6fab50fe0c---setojak.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f7df49687---95908146308.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=law+of+sine+and+cosine+word+problems+with+solutions+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_off0000e1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BB 18084 bytes
SHA-256: c5f25ebd5a0333fadee3f950f83fc7f08e36d4c5efaebc08cc1bdc4f5298e318
font_02_sfnt_off000128a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A2 11168 bytes
SHA-256: acdd2362aae0bec75133041131e149dc60fc50fe0f8140253697a3c09e00c628