Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bcf043a7c082b53…

MALICIOUS

PDF

60.3 KB Created: 2021-02-23 10:40:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 740ffadfe05032111e0ee3de91b6c617 SHA-1: b008fb126e3f934e788c822958862acd65635ecd SHA-256: 9bcf043a7c082b53411001e7db330e1d18df5615d032489ba39549eb3eb9afae
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/wix?keyword=cosmos+episode+2+worksheet+answers+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480598/normal_601e804a3aa5e.pdfIn PDF document text
    • http://akvatehnika74.ru/learn_spanish_language_free_downloadg5pqb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419644/normal_5fe96fbadbaa5.pdfIn PDF document text
    • https://cdn.sqhk.co/josipinu/gcexUeR/tiktok_viral_videos_philippines_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427793/normal_5fe209e315855.pdfIn PDF document text
    • https://cdn.sqhk.co/debefuki/hbggypt/silicon_valley_tv_show.pdfIn PDF document text
    • https://cdn.sqhk.co/joremeve/ffFgdRq/freestyle_street_basketball_1_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466172/normal_601542db93dec.pdfIn PDF document text
    • https://cdn.sqhk.co/veleviziwew/zqahiaW/dulasifenizimijelujaro.pdfIn PDF document text
    • http://piredvizhnik.com/tidosas3hly.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402504/normal_5ff58184ec26e.pdfIn PDF document text
    • https://cdn.sqhk.co/pigexebobe/jahieGW/17267382230.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529149/normal_5fe6a8960bf90.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000b1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1BD 5464 bytes
SHA-256: 8a5409a16e8ebb4f192ff79936aa0f8f31fd783a8aa4d870ac54700287148813
font_01_sfnt_off0000c43b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC43B 9452 bytes
SHA-256: 3f3360f694c8d16cbbd360f2e695cdd255903601a3dea9747d6ab4b0f457f7bf