Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2ac91f6fac8f10e…

MALICIOUS

PDF

75.7 KB Created: 2021-06-18 03:22:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 88e2dff41c4ba81cc41957c52cbcef4f SHA-1: 342eced9532f84974c0546878416e51384d2cd5d SHA-256: d2ac91f6fac8f10e83e635ef43b4dafd526145480736cc9f3f6af7444c68a1e3
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms and appear to be part of a link farm designed to attract users searching for movie downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/28107a3c05d0bd48de0b1566dbbd4b9b/visibikagoxe.pdf In PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/hadspjdmo5dbv370prge5mfcqr/22739080238.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092b2648b8c0---rizomisobexipu.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/rokovijot.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a404581dd9---vonuwovusebidegenafapebu.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/n2abv5imdoq73uadkm7ucd6v16/5813299148.pdfIn PDF document text
    • https://flyfinz.com/userfiles/files/ratezajulufevep.pdfIn PDF document text
    • https://marigabung.com/contents//files/30716892086.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cbe6660c2ae---leputebevizit.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/afbfc3e533017c6ed22c191034ffc946/49318971449.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/jizifalir.pdfIn PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/lekexugur.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16090d9bbafce0---46974149447.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile/%5C/2021051203484091.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/da9c1e35f8f0112b6b7b346055022720/metamezefog.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/62132213500.pdfIn PDF document text
    • http://bmhs1963.com/clients/7/72/7286fd37811b7a5dece6e69924e4d5ab/File/luwedurad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=supreme+telugu+movie+download+utorrentPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E9 5356 bytes
SHA-256: c783f90b2180fec1c354929d0766ea5620fa7af6c5efe4c34826f97a57e4b861
font_01_sfnt_off0000fc1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1E 10988 bytes
SHA-256: 05a7e01daf9a432f0ff3baa5225592152da5dc1f5f42fe76f1c43337f56aad54