Malicious PDF — malware analysis report

Static analysis result for SHA-256 3345254845961d58…

MALICIOUS

PDF

89.8 KB Created: 2021-06-28 01:17:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 31748efa69d2bd101f855929cdfe06b4 SHA-1: 5137d829b9517d929d1aa0b98bb6064b9f5ca3ae SHA-256: 3345254845961d58f66b5f7d38c80bdf00edb7b00a56a7922359c053b4b1c752
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. It contains numerous links pointing to compromised websites, suggesting it's part of a phishing campaign or a lure to download further malicious content. The document body is heavily obfuscated and unreadable, but the presence of external URIs and compromised CMS upload links strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://garglob.ru/uplcv?utm_term=complete+story+of+ramayana+in+kannada+pdf PDF link annotation
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16082e5e7f33f2---57775094393.pdfIn PDF document text
    • http://kondicionery-lubertsy.ru/upload_picture/file/kojotiwubebugatugirusudi.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/71717b064602769e3dc53eb60329abdb/vobotemuzirevaxabofovef.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/28bad5f8233de6b97aa686c921b7a794/24785307090.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/vemonulaboge.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/643518e35d479dc66191a6d5adfb593a/32292350401.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c90dd746b4c---bozuxazivezujodexuwagov.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/6ufemd2dtbonbbun37l6tcoif7/gozeseduvuramipesifagunod.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c78ff47b4a8---51456927938.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/hp8nioncrdlv68cvjehl6svdn0/32919369110.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a30e830fda8---21435576235.pdfIn PDF document text
    • http://aps-mes.com/files/file/vulegurarovojosizu.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/53786118663.pdfIn PDF document text
    • https://lifo-sea.com/ckfinder/userfiles/files/78098768879.pdfIn PDF document text
    • http://snypes.nl/img/customer//files/kivarekid.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/2addad3596296e4bf71d6254070b93b6/luzowubajo.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160790a42729de---melomosewizosawovepuju.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082910d0b40b---pipofigofezetunokulaxim.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0753aa70d7---18297988177.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c48dfb81579---gowupobifuzepujokenubi.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/7f7b2d11f2d9b72ed18ca172ac8e3800/56475998432.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_off0000f7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C0 18180 bytes
SHA-256: 21334515f747daeaf939c395bfbf4b4d979a1747181f6e597596ada92eb6da6d
font_01_sfnt_off000126eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F02 10896 bytes
SHA-256: 7c67ad0c1e4dc71c5d016fc30def99fdb2a7c058ce11bc9be5d661c2e3422824

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