Malicious PDF — malware analysis report

Static analysis result for SHA-256 007ec4835e4f1cb3…

MALICIOUS

PDF

87.4 KB Created: 2021-07-02 02:05:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: be10986715e1034105074f8156613845 SHA-1: 2ee7855d90bb4924e9a28f062cea2e64acf19de7 SHA-256: 007ec4835e4f1cb3c406d24177f1e638d37c5b520e4229c0832c56ac035360dc
156 Risk Score

Malware Insights

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

The PDF document contains numerous links pointing to compromised WordPress upload directories, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple distinct hosts and the use of UTM parameters in some URLs further support the link farm and potential tracking/phishing nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160785f3fe570c---2146761344.pdf In PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1946172136---78053441120.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/mn6bmk2r0es1p6b9hhg7uh974n/pewezopovasomijuvit.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/42922748163.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/90975ce5a78217f9e4171660cd0364da/juridiladupurilelo.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a8edf975e1d---zibisemirelebasonuvu.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/11054162141.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/51544307097.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/letalijubinizawe.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/watadejuwowudefadis.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b726263e7f1---47983456563.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/82c9189c8c42c53dd7169f1d3de5e547/disidopututijefavuz.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16082c7c29c0c7---rejumuku.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/ijtn3ibhjbotaptapqgo806dp9/6204322646.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/97486171462.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3622d650f---dalorexabode.pdfIn PDF document text
    • http://cocoal.com/uploads/file/tixori.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/51813675174.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160867a6d5db1b---dowawujojubirere.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/67433807698.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfb73562e38---74564732646.pdfIn PDF document text
    • https://rockdental.co.uk/wp-content/plugins/super-forms/uploads/php/files/23450fcc58c04f8b06c4ca084d910b7f/kogeropovisagaxebawos.pdfIn PDF document text
    • https://gregor-biffiger.ch/userfiles/file/jopubewadisadujaj.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/71204841385.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/jezagizewofez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=what+contains+high+fructose+corn+syrupPDF 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_off0000f205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF205 17184 bytes
SHA-256: f55c9bd3e17abb18e663eae014b4fd3453e49cf25ec01c9cd02cb915ebbb74ed
font_01_sfnt_off00011ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000136e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136E0 10920 bytes
SHA-256: cab33d301e80de9825ae86b3fb8ea1e4f8e2bbb858834ad6b8f3ab5226ae87e8

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