Malicious PDF — malware analysis report

Static analysis result for SHA-256 45d49e690cdf6ab5…

MALICIOUS

PDF

75.6 KB Created: 2021-06-14 04:26:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d0a42311545f7f6f5caa9fe4563385ba SHA-1: 0b182c7ab0b1a1d2fe2bcccdebcb0435d73b3080 SHA-256: 45d49e690cdf6ab5a4e20901640ab66a89e4ca5a6e3efe61971009e955e7a62e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to compromised websites, suggesting a link farm designed to redirect users to malicious content. The ML classifier strongly indicates maliciousness, and the embedded URLs are likely part of a phishing or malware distribution scheme. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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://wastran.ru/uplcv?utm_term=motion+graphics+for+premiere+pro+free PDF link annotation
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160ad94c3e0581---63327261620.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/8i164i9dq4kvklm59bkmlh6c29/jenawetemix.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160817193426cb---nomadexolarame.pdfIn PDF document text
    • http://amandamaitland.com/images/file/golasekeg.pdfIn PDF document text
    • https://aokman-drive.com/d/files/deken.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160877e6b218db---51675170088.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a93e755596---rifaregilesujeg.pdfIn PDF document text
    • https://www.visitrwanda.com/wp-content/plugins/super-forms/uploads/php/files/db7b492ed20f2828a0fd24f6e15faedd/66930218703.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/b7b51aac57d689e7dd0aa267008a7c61/90044786593.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b0af5ad33---5590410726.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/96559212869.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/u9cqa4f1129ugg2fct65iq18ec/99778600132.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f71da2fa13---jesubumurademinoxokobo.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2f6884709---14076070061.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/bc342a7cc05ddb2e3eb6e3b80e50b531/33006095167.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e81d0c91f---84014179899.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/423aff014ac91b85fe68fd27b6801507/82447582925.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8131646ec---7123200591.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA54 5400 bytes
SHA-256: 392e146967e63162ce10cf2c1c7945c4c6a69bc3d5fb79576e44d1ff06ee294f
font_01_sfnt_off0000fc9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9E 10648 bytes
SHA-256: fdfc752c3318d3491db415b1c64e9cb131d2ad6545a959c35f80c6bbdaf767c9