Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad8273321334d2f4…

MALICIOUS

PDF

69.9 KB Created: 2021-02-12 00:19:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 5ea857b538e2ebdb11542eda65d2425b SHA-1: 2fd75308e537eb281de636ac4c89f15be07da5fc SHA-256: ad8273321334d2f48aa996e4a7585a7d9e793be24c6c22a171f6d9eb5fd87b71
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/wb?keyword=methods%20of%20teaching%20phonics%20pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409095/normal_601cab2431656.pdfIn PDF document text
    • https://cdn.sqhk.co/mapetidul/GibZ5Sw/gozivoxunefuwifubamixalo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407314/normal_5ff80f29b0b89.pdfIn PDF document text
    • https://cdn.sqhk.co/fenajobuwer/hcCkl4j/learn_thai_podcast_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450519/normal_5ff18e179102c.pdfIn PDF document text
    • https://cdn.sqhk.co/gazejuruni/Ckbiaee/youtube_music_vs_spotify_sound_quality.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482027/normal_5fc9f994f093c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467030/normal_60080867406d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443598/normal_601487e243362.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463788/normal_5ff03a240dbe6.pdfIn PDF document text
    • http://good-production16.site/84891348187lw2cp.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovusig/gjqhgii/47908701042.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/jovekus/maveputuwukitanarodowom.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/worksheets_about_demonstrative_pronouns.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/puwutavu.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_off0000d569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD569 5296 bytes
SHA-256: 95ea992b9e5be5a36fb42b708b663ae9413f3c2c3c793e98f9a21a578126d4d4
font_01_sfnt_off0000e77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77C 10480 bytes
SHA-256: 1494cea890c749bffa91e4210d695b0dfffd86e5e3c5e50cf88dfd94add31a46