Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aa4ecd9cd74aa8c…

MALICIOUS

PDF

97.7 KB Created: 2021-08-25 13:17:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 637f171c164bae3ec6a482a501c944af SHA-1: e21e5ac92e197c3d07e657bbc60847c52638363d SHA-256: 6aa4ecd9cd74aa8c9613ad73dc5d76e1461e5d11cf55ed46fd04047720fa114c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is the primary mechanism for executing malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ludifrance.fr/userfiles/file/69240377093.pdf In PDF document text
    • http://cascinamana.it/userfiles/file/dikifezakawedezamuk.pdfIn PDF document text
    • https://coebmsf.com/userfiles/file/92100466153.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/57204f51ed0e6677ac539b5d86e51c1b/62290326845.pdfIn PDF document text
    • https://geniodelweb.com/file/98522514804.pdfIn PDF document text
    • http://xn--9i1b14l32gg2dsybq3b.com/upload/fckeditor/file/pozitoge.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a8819952522---11483344828.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16083bfbaa481b---rarekepuluwowek.pdfIn PDF document text
    • http://ipsaix.com/ckeditor/ckfinder/userfiles/files/72373291929.pdfIn PDF document text
    • https://madspot.dk/ckfinder/userfiles/files/rijinotonaralidifuk.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bf3b4f7228d---88913678604.pdfIn PDF document text
    • http://happypalettebnb.com/CKEdit/upload/files/94821415968.pdfIn PDF document text
    • https://jslt.site/js/ckfinder/userfiles/files/wixilinopejogujorebaki.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/nobagevisabonegowiweguri.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5d85515a7---9854578251.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/finibu.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606dce6544edb---72686438880.pdfIn PDF document text
    • http://panda-es.tokyo/yamituki-n/uploads/files/jomimobulasufekizukene.pdfIn PDF document text
    • http://southport1969.com/clients/861680/File/42903735290.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160d5e9b9d6347---25715199408.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b83f1399e5---bokavibekonewemobinenenis.pdfIn PDF document text
    • http://lohs69.com/clients/82366/File/tezowepetedaxavakegex.pdfIn PDF document text
    • https://eingangrad.ch/userfiles/files/15599496614.pdfIn PDF document text
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/buwowerawip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=what+happens+if+they+suspend+your+licensePDF 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_off00011a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A87 10924 bytes
SHA-256: d0a42732b01f72f79dabe72c368922a6ddf63654cf365e83443c5d37741c137c
font_01_sfnt_off000133d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133D4 16964 bytes
SHA-256: 0ed2a6cc43870b8e0cfcebbe2ba2e2284346fba92e505051e4d7fb62b4d063a2
font_02_sfnt_off00016034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16034 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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