Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ca00329508f976…

MALICIOUS

PDF

93.3 KB Created: 2021-06-30 20:01:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f2c7106f897eb8936dc3df3cae97fad9 SHA-1: 9576d75899140e2d2fdf6df5442be75b54cde950 SHA-256: 14ca00329508f976843335e0e892ff055f80f96336e47b20b804553ac1a5b583
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other domains, likely intended to lure users to malicious content or phishing pages. The document body is heavily obfuscated and appears to contain metadata from the wkhtmltopdf tool, suggesting it was generated programmatically rather than being a user-authored document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cructi.ru/uplcv?utm_term=god+of+war+4+android+ppsspp
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092bff45d09a---zemakifubimeninomevi.pdf
    • http://bomtvplus.com/data/board/file/20210523155710.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aefbf714dbc---83657309363.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/8e952ea6e473a08b7b7ca5781db3f7a8/47037443261.pdf
    • http://hotelgiottotorino.com/userfiles/files/47241774196.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/440s0u6oou1a4dsu856ncis8uc/beses.pdf
    • https://alakharia.com/public_html/userfiles/file/65960666098.pdf
    • https://mariellatriolo.it/public/file/nisoposonibiniwajedu.pdf
    • http://anhbanglaw.com/userfiles/file/zijedevoxubag.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/ujfslmfrhuhuc2pj4npg27qv38/30203111565.pdf
    • https://adepotcustom.com/UploadFiles/file/20210524201935152.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b195e276257---91085759021.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/1c5a5c6b3a40bcf11e18bf609a0c510e/kavitamorat.pdf
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/fooq8n0b271kh964893onu255f/wivemarirofepewe.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16094942eb5281---67299013720.pdf
    • http://am-assets.com/aom/magnolia/userfiles/file/94440359909.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/de5d38335648b20936eb5a567f4f68e3/34950016439.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160982d705f8cf---46196778723.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/b562a1853687f7aee28b94d638782fce/2155355587.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aea2b5d774---tewudosunube.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b028e311952---72017193781.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/dg6so1i2o713el06uok3gkf7hn/witokazuwojupowesule.pdf
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/cnfigsfqhstrfimlg0th68pn2e/sizigukorejalaxoloz.pdf
    • https://securitydm.com/slicice/file/fiweta.pdf
    • http://atek-ent.com/upload/file/36730023966.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/7802553f915efafbd46ebc83b43f4172/21713501996.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
font_00_sfnt_off0000f2e4.bin
8ea9c79622bb1c6982d245067e772aaa9b16c5be56b94a0231589f893d902c6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E4 18552 bytes
font_01_sfnt_off000121d1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121D1 16792 bytes
font_02_sfnt_off000139e8.bin
4440b27ac46895b43401a7d9bd48ae3667b421612fda68a4e7be22a7745bb2c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139E8 10420 bytes
font_03_sfnt_off000151b3.bin
72eb9f519ff6411885f1677b0d43ce6c6997fe2045027aad879bf698c67126f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x151B3 16240 bytes

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