Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6e71ae1ca2dbcaa…

MALICIOUS

PDF

86.7 KB Created: 2021-07-08 00:28:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 5218a79a5f6e350e588c24cfbf624310 SHA-1: 409713f6d1087bc65784c9ba8a2e8e4e48d7063a SHA-256: e6e71ae1ca2dbcaad389c4380c2dcf2854fd2a7012b73fd97d5f84b281b0d03a
164 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or malware distribution lure. The file contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download' button lure further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://coretry.ru/uplcv?utm_term=train+to+busan+2+hd+movie+download PDF link annotation
    • https://foodvellythailand.com/upload/files/tegomivapopumatabu.pdfIn PDF document text
    • http://patokapugsnkisses.com/clients/61143/File/45038607245.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a6061cef848---nadakose.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/9922654488.pdfIn PDF document text
    • http://yacpa.org/yacpafiles/file/figigakamovukixu.pdfIn PDF document text
    • http://ogbchurch.com/clients/880797/File/mojixibuvupidezi.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b069919a63d---87622655928.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/8ed85726fbc03c91fb15f4df5a76253c/73161480321.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/voduzetaxuwowumadun.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b42ee1db18---11495905733.pdfIn PDF document text
    • http://fygl.net/uploads/file/101754186866.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/bd87d676169ba0bc63ba6c19315362b4/kobuz.pdfIn PDF document text
    • https://birudongker.com/contents//files/nevibotorudipudibadarinib.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/28329025144.pdfIn PDF document text
    • http://kasargod.net/uploads/file/62404906918.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca65a36fdf---vutawumimeji.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6454b5f35---nemajuzudinawazida.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/a509ad1716ec11f64912be42a3e2d81d/fipobemanuwawirabolenalos.pdfIn PDF document text
    • http://marketherballize.com/ckfinder/userfiles/files/mokute.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/5d5ba9cc258ef5840b59b81c2f5f8bff/mokovabem.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/a51d6928a7d17b1943ca96cc6e3fc23f/keruzirotepanixofaw.pdfIn PDF document text
    • 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_off0000efeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10802 10988 bytes
SHA-256: a73efbceebc971693efef9b271aab60a9da3704ce64babc2c5152d002fbf8f3a
font_02_sfnt_off0001216a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1216A 16964 bytes
SHA-256: fdf84a9ad47b15223b2597c899cf25faebe232a7cc256dd052e3c5cfd9e3a564

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