Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f3770f47b024c96…

MALICIOUS

PDF

74.9 KB Created: 2021-09-10 15:24:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fcd525ebdcc7ccf6bd0f3625e33d2471 SHA-1: b9d9cb8c649df43c94948dc0bf5e265d5d8321c6 SHA-256: 2f3770f47b024c96bad537ca5946746678cf3b73f78fff9f5d1539d435629ead
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Multiple heuristics identified the document as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious files. The embedded URLs, such as http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16130ea6a287d9---jidumarisipebejorepegutos.pdf, are likely used to host or redirect to malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc1e23a9d0---20167708483.pdf In PDF document text
    • https://webshopplus.nl/app/webroot/files/userfiles/files/palakalosuxukepafoba.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/82132265616.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/161337a79042f9---lesovepam.pdfIn PDF document text
    • http://liluby.com/upload/file/jowurubelolanuwes.pdfIn PDF document text
    • https://bestrecycledautoparts.net/images_i/file/xanexevijususefomirutixow.pdfIn PDF document text
    • https://sesconbs.org.br/ckfinder/userfiles/files/dadivilojek.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16130ea6a287d9---jidumarisipebejorepegutos.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16132335a8a54c---xijopebugevem.pdfIn PDF document text
    • http://baoveantam.org/upload/files/69363057817.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1613a3be4b0d83---madufutite.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613597a0e2ca8---63638827894.pdfIn PDF document text
    • http://mutamobilya.com/images_upload/files/84233859080.pdfIn PDF document text
    • http://symbolfoods.com/files/file///69107887519.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/kixedesudurifupija.pdfIn PDF document text
    • http://studiozammuner.eu/userfiles/files/1474959191.pdfIn PDF document text
    • https://istanajpdua.com/contents/files/909333158.pdfIn PDF document text
    • http://soles2walk.com/data/file/79752181607.pdfIn PDF document text
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/59760928695.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wirokutetid.pdfIn PDF document text
    • http://moriefrusca.com/userfiles/files/tonukefekokifezebu.pdfIn PDF document text
    • http://medianet2000.net/amm_prod/image_news_popup/file/sifomolabo.pdfIn PDF document text
    • http://cdio.vn/uploads/userfiles/file/12036048424.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/161359e88b8a17---78209173344.pdfIn PDF document text
    • http://air-con.ru/upload/files/69429714246.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=apps+for+android+free+download+apk+filePDF 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_off0000c127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC127 17600 bytes
SHA-256: 500029b6d2f551c14dccd8821b6e3202ab0be539757bb321723ac00f6089afce
font_01_sfnt_off0000eda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA1 10552 bytes
SHA-256: eb720688913b1a268b6838b984f632d4a4fda8a75b0d0c583514b0c6c20ce285
font_02_sfnt_off000105de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.