Malicious PDF — malware analysis report

Static analysis result for SHA-256 467a7c76ab2789a2…

MALICIOUS

PDF

58.9 KB Created: 2021-02-14 03:18:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: c059d8d1f9707f2f75de1ad86d5c4e9f SHA-1: 6941c9b97d6919f13b800da80cf9cbf2763deeec SHA-256: 467a7c76ab2789a2c5db1777f3863ad90dd48264ced5ec497f0367a46151944c
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/wb?keyword=free%20printable%20cursive%20handwriting%20worksheets In PDF document text
    • http://pitijebubitos.iblogger.org/70512047130.pdfIn PDF document text
    • http://2gusevshop.space/gerokebunanedb7fr0.pdfIn PDF document text
    • https://cdn.sqhk.co/zolewiko/ZjiR0jd/advertising_on_facebook_vs_instagram.pdfIn PDF document text
    • http://vojirumabi.22web.org/mod_apk_temple_run_2_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/moviferu/qPjggM4/one_touch_drawing_apk.pdfIn PDF document text
    • http://masotobu.iblogger.org/nijinopitelozudesin.pdfIn PDF document text
    • http://rukofuvifoti.22web.org/kedukewosisujugeko.pdfIn PDF document text
    • http://probnik1313.tech/392704203978rpef.pdfIn PDF document text
    • http://begemotiks.space/81774276240sbhrt.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/minabiwa/printf_format_bool_c.pdfIn PDF document text
    • http://pinopog.rf.gd/rivamevurejiz.pdfIn PDF document text
    • http://jufofokisib.epizy.com/anatomy_and_physiology_connective_tissue_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/cross_domain_report_google_analytics.pdfIn PDF document text
    • http://zefuxaninegug.epizy.com/81220387065.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/82297151495.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_off0000ad8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD8B 5644 bytes
SHA-256: ec1aee21e0601c70e61753229ea68d3cbd77f83f621e20936c64bda9660b4fab
font_01_sfnt_off0000c0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0C5 8824 bytes
SHA-256: 067d0aeea71ab923522812faadc2530f4485f66db30e111731b69a7bcb559e4a