Malicious PDF — malware analysis report

Static analysis result for SHA-256 b233b4f3cc5e05e7…

MALICIOUS

PDF

73.1 KB Created: 2021-02-28 21:19:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c573829778d147223ef6858c39bdae4f SHA-1: 2fca02c5b4ff67a584d766b1591a34b1e560a194 SHA-256: b233b4f3cc5e05e719974a06a6c10fd8626aea88a34f37c38565af17936aa890
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://kuzutuzo.ru/wix?keyword=descargar+apk+de+facebook+lite PDF link annotation
    • https://cdn.sqhk.co/lagolipumepi/eRjegd1/my_little_princess_movie_1995_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/retobumoki/5jh0ojb/my_talking_tom_2_mod_apk_level_max.pdfIn PDF document text
    • http://jitokinut.iblogger.org/segikesugopiwerabokotegi.pdfIn PDF document text
    • https://cdn.sqhk.co/lakivasulis/iSjaPFO/gumopojifojagaje.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454286/normal_5ff6b976d7f6b.pdfIn PDF document text
    • https://cdn.sqhk.co/zanotunuzi/hcNjige/vawiwekanag.pdfIn PDF document text
    • https://cdn.sqhk.co/woxutonezem/hdheHi9/88050632746.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/hihhhlJ/kpop_music_shows_criteria.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/igJ3Q35/super_go_kart_for_sale_under_200_dollars.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/tometubufimopim/77571703293.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/nakavokutorojaluzogifilok.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/camera_test_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/juvovidu.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_off0000e0d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D2 5524 bytes
SHA-256: 3d7486e7797fd554f31f2669650c983512b3471a02e6fd64ec22110abce22231
font_01_sfnt_off0000f3b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B8 10440 bytes
SHA-256: 5f6c0c3ebcd69b739ca123fb10ef46d7a1e1992063b0ab7ed77f6d8d3bf2964e