Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d77eee1d60fe02…

MALICIOUS

PDF

86.3 KB Created: 2021-06-28 03:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4856f2603243dddb058bc89252333dde SHA-1: 7fcb3a7643f4a1dd8f8b8dbc59895481312f35b3 SHA-256: 97d77eee1d60fe0285dc8e0f955790e250168cab04c6352f0c7199d6277f7eed
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document impersonates a signing service to trick users into clicking malicious links. The links lead to compromised websites hosting further malicious PDFs, indicating a phishing or credential harvesting campaign. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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.
  • Document signing service impersonation lure medium SE_DOCUSIGN_LURE
    Document impersonates DocuSign, Adobe Sign, or a similar signing service in a signing-request context
  • 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://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a11b402c89d---sesewowavijepep.pdf
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/dbhnfd1333l0s3jg4l0mi1vs8c/51721917793.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/093c89e265e0f3daa81a04bb706476b9/39356658757.pdf
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/f5fa1a95dd3d9e331ae443ab64da028f/radiwupixid.pdf
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860e9a6b720---74420803167.pdf
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/8feffa998f713e4fbdc6d24a503b0e9a/56499158701.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160982c36b3360---73478947608.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b457ed1591---17022206375.pdf
    • http://www.aadhar-interior.com/userfiles/file/50754991510.pdf
    • http://cjandjunemillerfarm.com/clients/75830/File/migumuvosafeni.pdf
    • http://s-privod.ru/userfiles/file/67967401117.pdf
    • http://cmuniontravel.com/userfiles/file/66292969765.pdf
    • http://nedirajtebosnu.net/userfiles/file/zepalomaluliwu.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/69d9f03dd9b461970e68cad641f64800/39326118185.pdf
    • http://kolaykanal.com/userfiles/files/86017467682.pdf
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/976c6632526dbd8cf1f936e7fabe7990/13071775589.pdf
    • http://fine-cottage.ru/userfiles/files/4850253747.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae70d5db18---54039206035.pdf
    • https://kvkumariajnkvv.org/singhania/downloads/file/gerevebe.pdf
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/ddd3389b2c5f50b393fa2aa658d07454/tewuxibetabi.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1e760bd8d---22834425357.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/816ea2027b04e4a73009fa09cdd244eb/sabasujakegumaxi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+edit+pdf+file+in+foxit+phantompdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ead8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD8 16792 bytes
font_01_sfnt_off000102ea.bin
07333fb2f85fb1fe1db36808a0f8a9231d3b55b1dd686ca969bdbf4d86586c95
pdf-font-stream PDF embedded font (sfnt) at offset 0x102EA 18960 bytes
font_02_sfnt_off000133a1.bin
198f80c446a8f907edf75d532f713681f870c810b8de72ba354111808ba8c1e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x133A1 10672 bytes