Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c69f1d1471dd979…

MALICIOUS

PDF

96.6 KB Created: 2021-08-09 01:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2e82eb6f5e103c52f4f3f8280c8842c3 SHA-1: 6c5960d18db7f7f5a4213b296e3546291a8aede9 SHA-256: 5c69f1d1471dd979605b9fb12c31aab30275ae545e697e5c9d9ef89e178604ea
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious files. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URIs further supports this assessment. The document's structure and embedded links indicate a lure for users to download potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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://begili.com/uploads/image/files/9387900702.pdf In PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160823948e590a---vukaji.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/satke8ussdtsqma55r7rksbn67/rugigirivenafufibafevuvak.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ffb274c471d---gokiluwezixip.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/kagelaxusijokupur.pdfIn PDF document text
    • https://www.notusweb.com.br/ckeditor/ckfinder/userfiles/files/78558127424.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/37736121113.pdfIn PDF document text
    • http://beachhigh65.com/clients/879402/File/54333551790.pdfIn PDF document text
    • https://argumentua.com/i/file/56408144014.pdfIn PDF document text
    • https://tanthuantelecom.com/upload/fck/file/buwapepeselug.pdfIn PDF document text
    • https://nestaerospace.com/uploads/file/82764267863.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b40de6ed5---gotiza.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/vurevagojuruzoba.pdfIn PDF document text
    • http://murito.fr/ckfinder/userfiles/files/sazaj.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/49976651631.pdfIn PDF document text
    • http://pescepiana.eu/userfiles/files/6670928214.pdfIn PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/pobafujilevorisi.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/b89e69af2bcd6e6748c81a80c99c742a/xabevo.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/j6u5mpbf2h1h9e28i4ajv0rgpe/tevakezef.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d06bb3a3ed---52220666673.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/2fe608d0f65d979def7823345f0b3bb1/xubimoneseju.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/vromf21040eq5rfvk79maf72ti/5764099930.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=catch+me+if+you+can+dual+audio+720p+free+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76B 16380 bytes
SHA-256: e20f1319638ac6d62e038bfb61794e41c6722a1afaf37180ebac22a32562fdb7
font_01_sfnt_off00010e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12615 18312 bytes
SHA-256: ea2c42a1c67a23523bbd5174bec1bd013ad4a16d7565f4a2038f3bf6d1f90fd3
font_03_sfnt_off000156aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156AA 11340 bytes
SHA-256: 678586faa01926ab38f37dbde69e3f45bce1567e338a752a767f067eafd56b77

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