Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f594d1df3d122e…

MALICIOUS

PDF

93.1 KB Created: 2021-07-20 05:22:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 031b296ce1dd8533cb794bc3ed44a25a SHA-1: 7089ffff4529bc29178e205c389ad019b5428e7c SHA-256: d3f594d1df3d122eae80423514be1e98b531931cc490fb277900b571e5e94569
164 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to compromised WordPress upload storage and disposable hosting, disguised as a movie download. This suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mistral-paints.cz/userfiles/files/78757077031.pdf In PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b05fb5efb2---82202013372.pdfIn PDF document text
    • http://chikatere.com/Upload/files/74693130219.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b80680ba27d---delepefotixusidewunuf.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/lmuce6qblgfq5u0enmlpc0v8ov/rudozefofenoriw.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c788632bd3d---11628507891.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/bofevaburetesokedatu.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/85711812186.pdfIn PDF document text
    • http://moscow-vernisage.com/files/files/vawipatu.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/4465e8d1a6fc53f89366e16b782f7a7e/4975142115.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/petol.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d858b18850---23003802910.pdfIn PDF document text
    • http://udclassof1968.com/clients/74076/File/77074426661.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/2379d6dff49fe5812c56a093cc3c7285/bidojujuj.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/86313499229.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c985c9c6db6---52194933504.pdfIn PDF document text
    • http://seashoresilverlabradors.com/clients/4/48/482fd9669fb3260065120a60ccac5e48/File/mazejefisuwefijomolip.pdfIn PDF document text
    • http://brownewingfamily.com/clients/a/a4/a4d7a48ed280e719b438ae57db99af5e/File/92781330590.pdfIn PDF document text
    • https://pediatricpotentialsnj.com/PP/PPpng/files/lepuvesabal.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160738abb1f630---fopozepikofexefe.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/ziwalerujixik.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a9f908ec9---30901971284.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/rajunusiwugofepemegeg.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/c0a506b4b058b220d7098c03017d4387/24225697439.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=the+fate+of+the+furious+full+movie+download+480pPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f0fc28960---75680129475.pdfIn 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://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_off0001042f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1042F 18104 bytes
SHA-256: 3c28f7d6122b701da677187fec53bae8bb6cc7a88ee7b6c69bb113dcd09e0cfc
font_01_sfnt_off000133bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BD3 11384 bytes
SHA-256: 0e9e443b275205648df3532402a92afd5938b94a984bc969b8e84568ee9ddaaa