Malicious PDF — malware analysis report

Static analysis result for SHA-256 96751d24872e6f4e…

MALICIOUS

PDF

79.1 KB Created: 2021-09-08 04:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a171af38093df32fc4ba922d993ee365 SHA-1: 4a703541f56e97ffdd2bc0e6ea6fba36f7c331e8 SHA-256: 96751d24872e6f4e849343be7367f48829f3488a646c3e280686d9b63119fa87
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the URL farm and the PDF format itself often implies the use of JavaScript for redirection or obfuscation.

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://dolphinegypt.net/userfiles/file/wuxivukowelu.pdf In PDF document text
    • http://boldino-hotel.com/ckfinder/userfiles/files/32402179324.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/37903444899.pdfIn PDF document text
    • https://kcharp.com/ckfinder/userfiles/files/57543000700.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/1v1j5diof2qfk79stdbnf8p0ba/tipapanofa.pdfIn PDF document text
    • http://www.odnpoznan.pl/fotki/file/file/fawesewofu.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/tuwolovobisujaxijetoxep.pdfIn PDF document text
    • http://sbox-technology.com/upload/datoteke/88764691392.pdfIn PDF document text
    • http://weddingdiy.cc/uploadfiles/files/20210611_163312_4470.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbf9fa6217---30179673754.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/sivomig.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/b3934e40497fa9c0703a787ae9f34dd7/26297336860.pdfIn PDF document text
    • https://www.adoz.cz/ckfinder/userfiles/files/punigatujemudofomimijakib.pdfIn PDF document text
    • http://inezorviskids.com/clients/37546/File/7199299374.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5a297e331---vivutama.pdfIn PDF document text
    • https://www.tocbirsen.org.tr/ckfinder/userfiles/files/bedulotamegiteniruza.pdfIn PDF document text
    • http://hasicimosnov.cz/foto/Image/file/gawiwadizakeramanodamok.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/47be6145a70c9459de4f3573203ee704/13742198093.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/70b2c80bc352ced7ef9a7b35265d03a1/70731843878.pdfIn PDF document text
    • http://cosyromania.com/media/file/9407048634.pdfIn PDF document text
    • http://letdentalab.com/img/files/82812033866.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ffb358ac4e06e32d67c835c9e65d1882/lurudenax.pdfIn PDF document text
    • http://sanzmendia.com/userfiles/files/48311376476.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=cultura+geral+de+angola+2018+pdfPDF 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_off0000c6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE8 11044 bytes
SHA-256: 3dabbbd59baea6243bdb8c31df5e9e52a93a0e2b5abb0dcafa8c7d6447f44ecd
font_02_sfnt_off0000f8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A9 21432 bytes
SHA-256: 6aa957e531cf2821327c84a241f9f6b1d06f9650702023126e25ff1e2c4b804b

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