Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eb1ec15b8b809e6…

MALICIOUS

PDF

86.4 KB Created: 2021-09-01 05:08:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: fdcf6e1f1d290818958b154954905c40 SHA-1: 7843c490e66606b38742d6b22c874e70f46b4934 SHA-256: 4eb1ec15b8b809e6aa3461dd2153b78d2ee3459a23cb0700c8fdae81d980bac0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. The document body is heavily obfuscated and unreadable, suggesting it's not intended for direct user interaction but rather as a vehicle for these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c780a5d10---85141272927.pdf In PDF document text
    • https://ymy-tea.tw/upload/files/tumobori.pdfIn PDF document text
    • http://recrute.fr/files/files/pidalogudebisebonijiv.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/969af2fd3e29ad3b1537c5dcc84f92f7/1213748834.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/ape35chbvngv05kvaugse5m4ln/22177734469.pdfIn PDF document text
    • https://vico-real-estate.com/ckfinder/userfiles/files/fexorarasibedegegigux.pdfIn PDF document text
    • http://explosivedevices.ru/media/file/nazolerofona.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/25288230120.pdfIn PDF document text
    • https://saleskerala.com/ckfinder/userfiles/files/73441665544.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210508183104.pdfIn PDF document text
    • https://irepairplus.nl/app/webroot/files/userfiles/files/mixufowasepodubanolilabuk.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/nisudipidepupuzokatuja.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610eac99cf867---73253129463.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/58636305488.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/61356309982.pdfIn PDF document text
    • http://eternoohydro.com/d/files/34817173634.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa6079308c---75010420630.pdfIn PDF document text
    • http://kenshopvn.com/uploads/files/duwasatirafajiwiwinog.pdfIn PDF document text
    • http://edwardfmcgintypa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nuxiriwisefu.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8787bbc67---6271926656.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607862bef0524---18175052710.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/740106dc572dc63b8d1c13a7afddf9f2/97074123275.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210812024519.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc7933d034c---bojuwudosojamu.pdfIn PDF document text
    • http://inarchengineering.it/userfiles/files/78924455710.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=ep+and+spassPDF 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_off0000eefb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFB 9780 bytes
SHA-256: 51448e0db12303f0e688d2ff82bfac4f2c5dcb54e01d902aa2f7be07818055ed
font_01_sfnt_off0001046a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7C 18040 bytes
SHA-256: fc677f54263d2e5a80d0cdf9e047afc4ed3c24d6b63e8b4a2743c6fcd07e14d6

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