Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe3d70ffaf606139…

MALICIOUS

PDF

72.3 KB Created: 2021-06-16 03:34:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 274d39f05938f8f37e54aece051f0f9e SHA-1: cb365a7d8bf953ccf28c1af02665d0d9efe31d35 SHA-256: fe3d70ffaf6061390d623015e964863e367b7e521c2c4d2b9c17b69aa774705a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. The document contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs indicates an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

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://ketchas.ru/uplcv?utm_term=jesus+our+blessed+redeemer PDF link annotation
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16073e84a750a8---43616319859.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/1ndt8282o9qr8iareedl6vm295/99952205446.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/sukimuxumovatuxivatuna.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160734db75f229---sijiza.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/91416626323.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/vezesejaroredi.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16089ba6dae84a---juregalin.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/4131b5e3dc2a17c739d00f4caa4a86a7/40612606925.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/9b8486138e65732bdb5fe9dec59b6080/38201889432.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/e788bf7b5a94b046037347ed94146d1d/63245506392.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160910e7213d60---bodajifesedemugopi.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/69576607904.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2b321a8c8---bogavetubogu.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/44951705059.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/g43ekujep0vri0442jcq32mtju/joxojejufaxowuletalotokas.pdfIn PDF document text
    • http://fairway.cc/images/blog//file/33752569184.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_off0000dee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE8 4892 bytes
SHA-256: c9846aabd65f7a7a6ff763805bed59c8cfa4ef85ae8e520caed56f14d8521ca2
font_01_sfnt_off0000ef6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6F 10756 bytes
SHA-256: e7daf56f61a82129f53c72fb9254dc816bb180ab82c0d9a1c39765e65c869535