Malicious PDF — malware analysis report

Static analysis result for SHA-256 075650cc1e8999ef…

MALICIOUS

PDF

81.9 KB Created: 2021-09-08 03:15:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 92f8a7206e3621814be6b4538c7c5e5c SHA-1: 308118094ea6aee159de464c7d4646bdf034958f SHA-256: 075650cc1e8999ef3e37fc06b373f1906d6e7db7390c147ed6427af5232bd728
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS uploads, suggesting an attempt to distribute malicious content or conduct phishing. The presence of external URIs and link farm patterns indicates a likely intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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.cenlajobinator.com/siteuploads/editorimg/file/22670418439.pdf In PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608daca12b521---36298124051.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc45099c849---80052207703.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/65152972276.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1610a9f78567d1---15241143710.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/mf5tepjmc5o4qa514htke2oj62/motuviwadomejoril.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/lusekuvukexiliwejonuf.pdfIn PDF document text
    • http://lakehighlandsrw.org/clients/863582/File/fuzemisikiwikuziwewemoxew.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa667536e37---fawasigisesukogiliserif.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/semop.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/2021611953205724.pdfIn PDF document text
    • http://ledins.lv/cms/file/xowivirudoxemomakiv.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/a617bc803c6fa9304d2920594ba6bc42/64153884716.pdfIn PDF document text
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/89740661562.pdfIn PDF document text
    • http://karinameal.com/imgdish/files/bemofonajozedadusofonobaf.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/82197377995.pdfIn PDF document text
    • https://club-sports.net/uploads/products/files/58681641850.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/72769033196.pdfIn PDF document text
    • https://4of100churchstreet.com/assets/media/files/53685085407.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1610432dd61ed3---37013658219.pdfIn PDF document text
    • https://marathonroller.com/userfiles/files/baravuxifejofaxivipopux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=tetanus+davis+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_off0000def6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF6 10356 bytes
SHA-256: e2afee20544bdd8ff6a481e6bdc4458ddb61ffa9f812773c07f70272459d52b2
font_01_sfnt_off0000f680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF680 16900 bytes
SHA-256: 9faf87c2a5f1ac9c3c621fb4c76933a87e75133d5b49cb1a024e07ab893282ea
font_02_sfnt_off00012239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12239 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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