Malicious PDF — malware analysis report

Static analysis result for SHA-256 52a726d2f139a4b2…

MALICIOUS

PDF

71.7 KB Created: 2021-01-27 23:17:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 5bfefe1b7fb64eaed2726e7a42f7adf3 SHA-1: a1ba3b1f0e19bd8e0e3a86ded3ea7c636cd09fca SHA-256: 52a726d2f139a4b2f0918f0563ff65945e26ab37e94614ea4795851c58484acf
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://seumenha.ru/aws?utm_term=comprehension+passage+with+questions+and+answers+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4478398/normal_5fda8f67c4224.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404308/normal_5ff4d2a934d50.pdfIn PDF document text
    • https://cdn.sqhk.co/nasanoroge/4viFgfJ/96973584208.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368469/normal_5fd39daa10dc9.pdfIn PDF document text
    • http://bonusiotsbera.online/foto_sexualnix_devushek5cc0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415946/normal_5fe3959b9683c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481839/normal_5fe4c65687357.pdfIn PDF document text
    • https://cdn.sqhk.co/kaxovugefulo/heifxRT/ligufoxut.pdfIn PDF document text
    • http://seomagnat1.online/46037178494x2n4x.pdfIn PDF document text
    • http://shopyou.online/97485738338w0yyt.pdfIn PDF document text
    • https://cdn.sqhk.co/kimejijomaki/eijF9iz/most_amazing_did_you_know_facts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377925/normal_5fe26f33af690.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/nimuwet/86120996497.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/cabify_driver_6._8._5_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/generating_allure_reports_in_protractor.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_off0000db75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB75 5548 bytes
SHA-256: fd35c7b81003471aec9c159dda0317a6c1fc9823f39b21b6208786b605314a39
font_01_sfnt_off0000ee29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE29 10428 bytes
SHA-256: 6fce5ee3a4be94de2a07fe230a0fd502db3d5e74f021057715dc38b8c5504d74