Malicious PDF — malware analysis report

Static analysis result for SHA-256 161dfce512f23c2d…

MALICIOUS

PDF

69.1 KB Created: 2021-02-11 11:40:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 4616a21499aded7316618fb21735b1e5 SHA-1: 99ae09da3bdd7c5146fb03780cae5e1d4d610afb SHA-256: 161dfce512f23c2dfe63158017ddbe979fc1cae183536653b874deaff61d254d
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=6th%20grade%20spelling%20words%20list%20pdf PDF link annotation
    • http://xtreme-sport.ru/ruxugakavibegetuzolh448d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388158/normal_601f842d7c69b.pdfIn PDF document text
    • http://excellent-spb.ru/minaferilezanikoxixes8cryy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408324/normal_601b54f96ffa7.pdfIn PDF document text
    • http://optarfes.com/jupebutokokubiwusou6m5l.pdfIn PDF document text
    • http://nefritthebestthing.site/61017320276akggc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408184/normal_5fcf611f0f06a.pdfIn PDF document text
    • http://salebox.shop/music_sheet_symbols_and_meaningwpacy.pdfIn PDF document text
    • http://tramlaweq.online/healthcheck360_phone_numbercfojs.pdfIn PDF document text
    • http://my-favshoph.online/601285112850i3x4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383147/normal_5ff326dfdd3b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486061/normal_601e11b640920.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/fonibinaraj/vozefufugekonevosezun.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/scratch_2_free_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/wevubemusonuw.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/amulet_book_3_read_online.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/46058630.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/bainbridge_ga_arrest_reports.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_off0000d027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD027 5456 bytes
SHA-256: 15e1658240f4786cfd40f0078cc33d1bf6c39b2a0c48f66166ec53bf7b9e3634
font_01_sfnt_off0000e2c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C1 10796 bytes
SHA-256: ea5919d9815d3a47bc48e26dfcb695c65ba443eb3c9c0ff27e2c5970dae5d5d8