Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fd1428a5a096b2f…

MALICIOUS

PDF

77.8 KB Created: 2021-06-28 15:06:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 0aa8fc0c2505f054dc53b9e0f60ff89c SHA-1: 7b2958c61e118d9133fe9997769f91319342f5f6 SHA-256: 0fd1428a5a096b2f20862fb1a8940a6d608d372d9e98fa29cd269d226727598d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, directing users to various URLs hosted on compromised websites, likely to facilitate phishing or malware distribution. The presence of external URIs and link farm heuristics strongly suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/4ada65457e6d6fa2dc596a6c03648b91/43201536966.pdf In PDF document text
    • https://motelandratecuci.ro/userfiles/file/30729391242.pdfIn PDF document text
    • http://grabnerestriche.at/35360090959.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/rr5kslj8i4915tt0dsq27bnf15/ronofikewezugekekinur.pdfIn PDF document text
    • http://abaj.cz/UserFiles/File/sumitoseboganarad.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/2b8d37791baa905dec754d974d2b8e07/10735293227.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/414456364.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbac96c36b---kurasuwewuzisob.pdfIn PDF document text
    • http://qhs1978.com/clients/d/dd/dd8db5a278a7ad55a2ada34b8e38ebcc/File/xokinad.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/5gfjnsae4t7d77hk9e5alh8ct6/netifedotiwowome.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/54927968888.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/3ildp8469u4smvi0rhjm49hm14/20979940819.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a43a9ca61c---kowatefuvideki.pdfIn PDF document text
    • https://capecoralliving.com/media/file/laletudaronarufuzudogi.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/peduwegefuxufisomuxewaxu.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607719ce20851---15214858346.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7b0fa05b2---83805765872.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/50f09de1c27f3f2ef6bb88b97003039e/82679052764.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1a5353244---pimixeruzolubedab.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160805a1b213d3---xafiluvopitak.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607dccfdab7c1---48963048049.pdfIn PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/9309254582.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/abcb98eeb57142b66543822e5f7fbf95/88061772967.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=qrs+bds+1st+year+pdf+free+downloadPDF 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_off0000cbb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB8 16680 bytes
SHA-256: 19f76475407c8e7c5eff96e39e11503efbeff723690bcdb07f686f81964ceceb
font_01_sfnt_off0000f6f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F5 10852 bytes
SHA-256: 5d6d5ac4531d7fd273c8ad4a65044b0b1cf931a63dc7cc0fec4ecea6b4201be2
font_02_sfnt_off0001102b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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