Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea4f331d9c1d948c…

MALICIOUS

PDF

71.3 KB Created: 2021-02-28 17:46:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 337173af421b7ed649fb138332f2085c SHA-1: 64f43b05eaca9ff8832f3cadd6049bdfcfa1c41b SHA-256: ea4f331d9c1d948cf0f5c5dcf1978cebe6b5bc4adb23d9edbb3879c9c5cebb02
184 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
  • 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/award?keyword=the+poky+little+puppy+golden+book In PDF document text
    • https://juvarefuj.weebly.com/uploads/1/3/1/3/131398009/fekulagiz.pdfIn PDF document text
    • https://cdn.sqhk.co/manizamo/hjxygcO/green_bay_packers_2019_season_scores.pdfIn PDF document text
    • http://atlas-copco.su/how_do_you_reset_a_treadmill6yt83.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/45344198703.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375199/normal_5fe9ef766e0f5.pdfIn PDF document text
    • http://siviveko.getenjoyment.net/el_resumen_mas_corto_de_harry_potter_yla_camara_secreta.pdfIn PDF document text
    • http://linavaluviriv.getenjoyment.net/58218753190.pdfIn PDF document text
    • http://podarokinsta.online/android_sdk_unity_manualbefgi.pdfIn PDF document text
    • http://smeh-mif.space/koxusuzofenoxip5kxw5.pdfIn PDF document text
    • http://jafoxidulez.mypressonline.com/35645015941.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sojufuka.atwebpages.com/nabuzovegadavawejosad.pdfIn PDF document text
    • http://medexode.atwebpages.com/83209573825.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_off0000dbd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD5 4992 bytes
SHA-256: e0bc993ebb5aeb133c49a20a536cd1145d51a5ead575e8f0efa531ee49aa8aad
font_01_sfnt_off0000ecd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD6 10440 bytes
SHA-256: 483ba21648b9d8b1707d5022c9bf1d63f5ee84a2abf9b7844245bc2bf65d8305