Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea90f70d3109fe50…

MALICIOUS

PDF

89.1 KB Created: 2021-07-02 16:32:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d0a2fab3d5c47bee88fa24c39c84df91 SHA-1: a593f010905fba859055caaadeeb030be8f2679d SHA-256: ea90f70d3109fe50997854bed116be624f6cf58fa813d9b11888a0093e32859f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the overall structure indicate it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

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://oniceh.ru/uplcv?utm_term=check+out+in+arabic
    • http://okmarin.ru/userfiles/file/dajiletiri.pdf
    • https://aplusadvance.com/naver_editor/data/file/61296028033.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1f8b96e5b---96820073335.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16078805a8b461---netaninodofigoponuwup.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/pverf33vu4pf1v6gcra571drqn/rilusekajesaxowakoxawus.pdf
    • https://ludifrance.fr/userfiles/file/gurazogezajijebaravi.pdf
    • https://hoakhanh.vn/uploads/image/files/wofojur.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071db8f6289e---rawupibimasebofiminudifaz.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16071ece66e405---19561111867.pdf
    • http://m3hotels.com/userfiles/file/64959924799.pdf
    • http://webinaris.biz/ckfinder/userfiles/publics/files/341844008.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/jro1cog2l63odhu5a7j0mg8uv5/89022554055.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/8903673e73cddb95ec3b054262147486/zugelorenugopo.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d5ce96a4a---belagadaxevejasogif.pdf
    • https://geneolock.com/locktactyuma/userfiles/file/15868424992.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a45c91127e8---38872441945.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608455b0714e4---85085868204.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/a68e37d34b0780ff75283ed625370e83/lonevulepalanogofu.pdf
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/56db16f210caffea7acfeb919641715d/jaxolud.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/t9r63aria5glgf1btnmv3rpir3/womomopinibidokejigos.pdf
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/18b9629d03d98cba5612e5e6f53f0b5a/naganizarami.pdf
    • https://kovtec.pl/eurostyl/photos/file/lajivexikorinolotusedo.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/s76su5rafe04g5pb5fv7v55iu5/fegowugosug.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160a6caf3e8bb3---norukavosomob.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/c5f4da58b576ec86cc6180ad3413104b/lemanivijipulutep.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/57ce9b335f1a4a88af0d4c90a375abae/bozuti.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00012b27.bin
d10d7c4ec01e2321e3b70853968712542416ed975c002ddc0ed7e982f6ec6191		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12B27 24484 bytes
font_00_sfnt_off0000cefa.bin
9977df4948f4ce7b5f237cbf11cb52c822759bdc491c03177a616140945f5881		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEFA 17188 bytes
font_01_sfnt_off0000fb4b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4B 16792 bytes
font_02_sfnt_off00011362.bin
d2819fb600e4907c7b2f22c5db81adf8ab9d81f92b1f9633d2f993125861b528		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11362 10476 bytes

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