Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec0a2c3fee304318…

MALICIOUS

PDF

104.0 KB Created: 2021-08-16 16:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 534ca3ed0e9452ab3e50e4807083e61f SHA-1: ba044d4373e97f4873bc97d72f781ea5658e7ee8 SHA-256: ec0a2c3fee3043183dbda390794cd4af6ffdb254a5a4b2104bbecd72bfb0d6ad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress upload storage or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://kusadasidentalclinic.com/img/userfiles/files/96136533764.pdf In PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160894ddf202cf---18611962662.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/417lpfgv1lreia4n20961c2tee/ruwuv.pdfIn PDF document text
    • http://skybuildinfraprojects.com/uploads/70531445514.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b1f191eeb---63920192085.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105040614332825.pdfIn PDF document text
    • http://chiangmai-esc.net/user_img/files/novopefilimal.pdfIn PDF document text
    • http://dancingstarsgreenwich.net/clients/1/10/10f73e4104fe6082999c9b722aa65ba2/File/leped.pdfIn PDF document text
    • http://imaginove.eu/data/Files/wetaxajidewuxa.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc8ded4c5b---finumimunisexe.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9f3a0b2b9---28836756868.pdfIn PDF document text
    • http://chichen.asia/ckfinder/userfiles/files/kinijik.pdfIn PDF document text
    • https://selltoob.in/ci/userfiles/files/94071858131.pdfIn PDF document text
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/guwareguwevimawug.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/442ccfe4830477e03524dc87a781ae85/vazopuxoga.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/colch3jfa7usjqo1l2tsggbf05/tabisakudinasuwafato.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/6agrop8ohfpiuv58kkrdbn83fo/pubibekex.pdfIn PDF document text
    • http://flemingfamilies.org/clients/8/8a/8af36a28baf44bfc7b8a7004fb4eaede/File/82034377483.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608733df8991a---80186368913.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160967610c931e---44549067868.pdfIn PDF document text
    • http://zuche0551.com/upload/file/79492948634.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a49bb41bc2c---xulapida.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/mitinupiputozupizegenuru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=what+chapter+does+piggy+die+in+lord+of+the+fliesPDF 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_off00012e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E0D 19812 bytes
SHA-256: eea8fa7624f7ff7815c7aa1920c53156701b2edaa266b8457e7f5d616e9689f0
font_01_sfnt_off000160bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000178d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178D6 11004 bytes
SHA-256: 82b5bed1387f33f2199c5ad453028f5c60527fb05208ec94869abe3fa5479fdf