Malicious PDF — malware analysis report

Static analysis result for SHA-256 da25857ce84f193d…

MALICIOUS

PDF

74.5 KB Created: 2021-02-22 03:04:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d216c261127cdfc9c009ea2dea284156 SHA-1: 98679f88c932db575b4ccdbba80d8fda01ba7adb SHA-256: da25857ce84f193d853eeb21506e954ab613c4b6c7a6806177396d048f317ea9
144 Risk Score

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
  • 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.
  • 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://baarspo.ru/wix?keyword=what+does+two+rectifier+tube+do+in+a+guitar+amp PDF link annotation
    • http://levantemosaic.com/wugosexomefebaliwon0bn1.pdfIn PDF document text
    • http://sberin.xyz/karuppasamy_kuthagaikarar_audio_song_freelj8vj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410674/normal_5ffb97bf77c47.pdfIn PDF document text
    • http://igclienteam.com/tornado_alley_season_2020742tr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367301/normal_60111fd07b15b.pdfIn PDF document text
    • http://shopsmmv.site/algorithm_flowchart_and_pseudocodesxr7x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386084/normal_5fc61fa0244ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454808/normal_60003674de5bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455377/normal_5fed417f4e673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456660/normal_5fd92d6ed5db9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497666/normal_6031f27567441.pdfIn PDF document text
    • http://legendarycraft.ru/movimiento_circular_uniforme_acelerado_ejercicios_resueltosy7i0q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473926/normal_6032f7ad510d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376357/normal_5ffb3d7cd6a5c.pdfIn PDF document text
    • http://quinzsy-studio.design/nexojovi2v3f.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_off0000e6ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6ED 5784 bytes
SHA-256: b791a408cefbf7afec17f40d8e875cce2cc4ebd64ec3d1148df51105ec144c5f
font_01_sfnt_off0000fa8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8F 10084 bytes
SHA-256: 9ae55e932df3c321d588e7c65c224d00df21de0fbd5918a8cc18bbdd72bb0ac1