Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d47dcdddad0ce66…

MALICIOUS

PDF

83.7 KB Created: 2021-08-11 12:20:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f88c66e3e6e66074a7e234744724325f SHA-1: 2795f8ffe686bd01d8dced8af8fd31fbb1af5596 SHA-256: 0d47dcdddad0ce661bb36b960752726c23d526c0336a8f3f3bb854c24aac05e9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160c514504ced0---27852171241.pdf In PDF document text
    • http://waterreducer.cn/d/files/96750565173.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/f14f9308d0990f80011c066f64d4a1d7/kumafezijapidurut.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/jibupiwuluzovagutoni.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/gumedu.pdfIn PDF document text
    • https://menu2uplus.com/images/file/29757006880.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/25111199276.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/1el8gusf6fiert13sh6l2s11m3/jituga.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6916b59907---33029108706.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/62193034160.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16072266c1e805---12927288227.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/jekerone.pdfIn PDF document text
    • https://defrokatilai.lt/images/files/nulejezevagetas.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/3mk6pvqorqvfeflue346unvcse/16507226466.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/42664006926.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/92927041125.pdfIn PDF document text
    • http://fletcherfamilyreunion.org/clients/52745/File/bivijadixoj.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/je1t4tusos4cs1h0rc0a3j8b43/48350170192.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/258cc4e1ecba1ad7efc2509749b6a16d/pamivod.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/66b75572088a1ed8e13b60f2e5e45d73/xisubapofoxaritinupa.pdfIn PDF document text
    • http://nesemlak.com/test/images/uploads/files/44853751791.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=nero+2017+serial+number+freePDF 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_off0000e4eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EB 10836 bytes
SHA-256: 1b33331b53b32d4b0e2c35165ee032c43093e4d9caa77ba89e7e4bc1156d356c
font_01_sfnt_off0000fe04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE04 16528 bytes
SHA-256: 2a37faf6aad4daea98391ce340b7d7b8cc66d91371a75a284611f4ac46e22e33
font_02_sfnt_off000128dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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