Malicious PDF — malware analysis report

Static analysis result for SHA-256 f83bd6897cc955d3…

MALICIOUS

PDF

71.5 KB Created: 2021-02-12 19:52:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: bf8585c64921d5a77116ebebfe95be32 SHA-1: 1e037bd37da480a23cf673e476a3284e5239bfc8 SHA-256: f83bd6897cc955d3ae943298c1006c919137331faf0cb86b4f700e9ed00acb83
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/wix?keyword=install+apk+on+firestick+with+adblink PDF link annotation
    • https://cdn.sqhk.co/kabolode/bhfjfjg/tubokiteb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418791/normal_5fdfd1e6c82ed.pdfIn PDF document text
    • http://gafaneripebenu.iblogger.org/74893404357.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377388/normal_5fdab491215a1.pdfIn PDF document text
    • http://tronreserve.online/hockey_all_stars_game_hackrabes.pdfIn PDF document text
    • https://cdn.sqhk.co/zudipoje/jhdgipE/what_all_pre_bridal_package_includes.pdfIn PDF document text
    • https://cdn.sqhk.co/kojetovukufo/ji0ojey/pejupojevekogil.pdfIn PDF document text
    • https://cdn.sqhk.co/kizusuvut/djcjbV0/syrinscape_tabletop_rpg_sound_effects.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://monufaro.epizy.com/handbook_of_engineering_acoustics.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/xefopezalige.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/africa_toto_choir_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/9175633475.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/joined_handwriting_sheets_ks1.pdfIn PDF document text
    • http://kalogoraretupo.epizy.com/xetexofakaxeguxokaw.pdfIn PDF document text
    • http://razikonuwivomo.epizy.com/vilenojurug.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/dha_multan_challan_form.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/cartilago_articular_de_la_rodilla.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_off0000da37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA37 5476 bytes
SHA-256: 01b70b455d9d92cae353ec8a4246ec55327e375284fcbb18c421a098f2ed74b1
font_01_sfnt_off0000ece2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE2 10428 bytes
SHA-256: 7a5b7f058d2d67975edfcc24e05eb45e7cbcbcdc763a9cea71e389d02e39f29c