Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d4cdb914ce7846…

MALICIOUS

PDF

83.7 KB Created: 2021-02-24 13:32:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 41105274e3003f9ecad13d05422363af SHA-1: cab95738545b0799d2a84fd310738382178c4322 SHA-256: c5d4cdb914ce78463974f8c72127fb283fe6ece7ed55c8dfec06a5ec0512e8a4
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://maypoin.ru/aws?utm_term=how+to+reset+danby+wine+cooler PDF link annotation
    • https://cdn.sqhk.co/tovipovo/S1hd0ii/ono_sve_sto_znas_o_meni.pdfIn PDF document text
    • https://cdn.sqhk.co/litalile/iipehaN/61951478839.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387235/normal_5fcc99ff99e2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458137/normal_5fe86795321d2.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/hjjjjby/knock_you_down_song.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495837/normal_602b98361148f.pdfIn PDF document text
    • https://cdn.sqhk.co/sirojenu/d3RHGhj/airwatch_intelligent_hub_login.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/lixisariwulo/cheap_android_phones_with_great_cameras.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/food_empire_annual_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/60227072927.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/marvel_heroes_game.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/stryker_1125_zoom_stretcher_parts_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/a_wrinkle_in_time_comprehension_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/lijiwavizixu.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/vokogulakexerumup.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_off000109e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E1 5228 bytes
SHA-256: 2c032baf75683fd614bde277d5ddb6e2003a5e9f974e87f0e7b7096d7a3a79b5
font_01_sfnt_off00011bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC7 11264 bytes
SHA-256: de9e0257b5ee8536bb529b31d7c44fd848f10e740dd99c86eee1ae8d6c2835bd