Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea76e9e27c850ba4…

MALICIOUS

PDF

144.5 KB Created: 2021-06-24 04:10:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2d63e2b66809fd44c2547618f2fbba5b SHA-1: 0bf75b806a7bccfdfdb053cb511f6d9ecc740812 SHA-256: ea76e9e27c850ba4ce05552aaf566b6cd1125de94bc802b40e5f85d120d348f7
164 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised CMS upload storage locations, suggesting an attempt to host malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://et-auditing.com/userfiles/files/relevolivafurenabami.pdf In PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/ftq1nqg28fkd1khfhln3pt5neh/61890655052.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7741934d45---gurawirefasel.pdfIn PDF document text
    • http://mysistermyfriendministries.org/clients/85776/File/1998944422.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bea48733ab1---2897977975.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ce82aba1286---56819586522.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160925676a6896---mupolibeb.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16091c29b783c1---45225191338.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/9041986360a8aa4f639b9.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aed35cca814---zasomoliduxudo.pdfIn PDF document text
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/43969573850.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/fupuxaladiwuxe.pdfIn PDF document text
    • http://contelex.it/userfiles/files/dajolibesa.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/4c1888588cc03ead68cca34f5f46ff81/venokado.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/98216666219.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/4a808be0b69da79c46a94b06ce2139a5/mejituvumosixezilewizopo.pdfIn PDF document text
    • https://www.stjohnhomelessshelter.org/wp-content/plugins/super-forms/uploads/php/files/b7a6317a90fde2825cca73d41f0abe1b/xujiba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=battleship+tamil+dubbed+tamilgunPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E1C3 4092 bytes
SHA-256: c8f7977f7fbec3c7e35771f1485e567f4b97d7c8417613413a34e01d1746e4bb
font_01_sfnt_off0001f061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F061 5464 bytes
SHA-256: 03cb5d7e12f5924d1d6af9906a86ed4fa2aaa8dcbbcfa2792ea039a2c358dbb6
font_02_sfnt_off000202c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x202C4 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_03_sfnt_off00020b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20B52 11996 bytes
SHA-256: fad96f276840f18388e8e2385c3bbb677e31e321e49106dce49e4f427ef21a0c