Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7958171492ebffa…

MALICIOUS

PDF

71.1 KB Created: 2021-02-07 22:05:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6dbac2d156aaef8ca118338d67f24303 SHA-1: b516289ce62a12a52f5fab0c40608c0e7717e53d SHA-256: f7958171492ebffa1028eac587eee8e0647973837f456a4e6e47c8daeafb5784
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jacksth.ru/wb?keyword=cadbury%20dairy%20milk%20silk%20ad PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387571/normal_5fee1550a201c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488809/normal_5feaf74f3061f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386073/normal_5fcd666f4ffd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457011/normal_6016fc0b6bede.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464732/normal_5fe2685cb2d2d.pdfIn PDF document text
    • https://cdn.sqhk.co/jakatote/jdgfhcj/paris_texas_shopbop.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/hgjiihb/63539406846.pdfIn PDF document text
    • https://cdn.sqhk.co/wisulekekij/d0zEghG/soruvamivuxe.pdfIn PDF document text
    • https://cdn.sqhk.co/gukisafuw/jegfOgf/photo_recovery_deleted_photos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/roware/88657257758.pdfIn PDF document text
    • http://zelepabuvokus.rf.gd/bixoxelijize.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/mathematical_form_of_heisenberg_uncertainty_principle.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/letter_to_past_self_template.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/follow_up_on_unanswered_email_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/ragixegot.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC85 5184 bytes
SHA-256: 9ca7d55a4007f712db687e8280dbed2c518d803ead83361c5a92ffd2e0783e32
font_01_sfnt_off0000ee0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0C 9884 bytes
SHA-256: 010f704237f13babc80db0b683fa938ce8c8e6146dd08c98fd3336278808b755