Malicious PDF — malware analysis report

Static analysis result for SHA-256 b91bf6372d000d55…

MALICIOUS

PDF

74.1 KB Created: 2021-02-15 12:42:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 67d29644440f427e446b6e1981a5b3f7 SHA-1: 2b018888414e2d0c8fe6c208666bb9efb80f557c SHA-256: b91bf6372d000d55b403c9b0afd87cb25bf295df14fcfe996b48728d47828bd4
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wb?keyword=washington%20wizards%20roster%20salary%202019 PDF link annotation
    • https://cdn.sqhk.co/kinanekoxo/ZyhigA8/al_green_gospel_songs_lyrics.pdfIn PDF document text
    • http://nubilejoso.iblogger.org/pevijogifalazuwekusu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491723/normal_5fda4c512ae3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474456/normal_5fd03fdd363ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382189/normal_5fd0ec46b73ba.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/ieUiajj/lemowobovox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409616/normal_5fdd7e39a2f21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491927/normal_5fe626a996c29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379471/normal_5fefa6be10530.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/d8fYOF0/lilunis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409619/normal_5fc97a3000927.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/fakuguvil/21078253666.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/leadership_theories_management_study_guide.pdfIn PDF document text
    • http://gapevizatijaba.epizy.com/19058996484.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/american_psychological_association.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_off0000e255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE255 5828 bytes
SHA-256: 0551ea1c6636cfe63d6545275151cb620dbaa96fcbf98dc1523feea756061a14
font_01_sfnt_off0000f64e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64E 10992 bytes
SHA-256: 7cc65bcaaddfc2c037aaa322b73e868bc9cf5f102a1f3ecb3e4f3f3b5b3d4f33