Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba5e86f02be55ad9…

MALICIOUS

PDF

69.9 KB Created: 2021-02-26 13:52:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4bad372cd52b167d86126f8704f1a39a SHA-1: 8cb46cbe86e1702170141b46a9372686facd6fad SHA-256: ba5e86f02be55ad9873c4c68b2786bbd3f97cc7c5aaa29bfaee73ecd9a96b808
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://dafemum.ru/wix?keyword=earth+science+lab+6-5+weather+patterns+answers In PDF document text
    • https://xoxigukot.weebly.com/uploads/1/3/4/8/134861038/roribumefibuw-dasusi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445868/normal_5febcd718788c.pdfIn PDF document text
    • https://lufuneliza.weebly.com/uploads/1/3/2/6/132682735/sakemab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402953/normal_5fdb2304225dd.pdfIn PDF document text
    • https://bepupoxusiboma.weebly.com/uploads/1/3/4/8/134847186/6303607.pdfIn PDF document text
    • http://chategratis.online/wubidefyopp.pdfIn PDF document text
    • https://bomaripuxizidul.weebly.com/uploads/1/3/4/9/134901287/zazamesipobu.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/hcjjbjd/97769382366.pdfIn PDF document text
    • http://taygerr.com/63990604232ojds5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481273/normal_5fc7d897a94f3.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fibesezati/wutulerigalidivibugobudo.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/asus_router_rt-n66u_firmware.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB7C 1560 bytes
SHA-256: 3c26a8223f1d007b35d3fc63bb968b1244831692f8a9bdddcfea4213fe8ed82d
font_01_sfnt_off0000d36d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36D 5520 bytes
SHA-256: 8c43e41a27fc9f4df32fa558484dc5be055561af435afbe8cb3b4b4e99795c50
font_02_sfnt_off0000e646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE646 10364 bytes
SHA-256: eb5d1e7ff2126b02cd9bacf2c3ef914270f62d70af52595e535dc25ebd641110