Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cd693072272945b…

MALICIOUS

PDF

72.2 KB Created: 2021-02-12 10:43:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: aebbe6d143df3fa4efeb101fa1db0549 SHA-1: 233d712062806a4a3647139f1a82a3f86d655c0e SHA-256: 8cd693072272945b3a2bd2440c61718e14aa191a126fa0771e0b079b62226891
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://seumenha.ru/wix?keyword=lesson+outline+lesson+3+answers+science PDF link annotation
    • http://sasavojaraw.iblogger.org/4035565957.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454184/normal_600cf42fa374d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495684/normal_5fcbf0d53c6d8.pdfIn PDF document text
    • http://starconflict-game.ru/liberalismo_clasico7ziuo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382621/normal_5ff9b25a01905.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488558/normal_60046dd6bc9bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387807/normal_5febde740212c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470218/normal_6013605a01e1d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366327/normal_5fdff87e9fcce.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/kegubinefuda/67445996056.pdfIn PDF document text
    • http://mabobasator.epizy.com/36485684131.pdfIn PDF document text
    • http://bodudubabafixe.rf.gd/gametukatexuturedexug.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/guide_to_intermittent_fasting_for_weight_loss.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/67498980605.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_off0000e066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE066 4988 bytes
SHA-256: f66cbf9bf12de9ee1ec055dfd3d2daccd8d00539ad940f6afad59853182b9eea
font_01_sfnt_off0000f180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF180 10028 bytes
SHA-256: 357e143cf09b33f8fed92491390102ca54b0ea8bb78586d52b54a1e045aebc60