Malicious PDF — malware analysis report

Static analysis result for SHA-256 a85e0655955c6152…

MALICIOUS

PDF

70.3 KB Created: 2021-02-21 10:42:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 21a51aada82d72a12754c1c886688e25 SHA-1: c6bf23e87a41265241b3322dec7df5d3405d108a SHA-256: a85e0655955c6152c392c7df6ddd90b67564a93b8b6e39ba8d7c1b56a3d634e0
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/wix?keyword=word+whizzle+it+white+answers In PDF document text
    • https://cdn.sqhk.co/jesotipo/0yQOhib/24894664765.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445573/normal_601605b211b93.pdfIn PDF document text
    • https://dolibaradodusop.weebly.com/uploads/1/3/4/5/134595809/fosobo.pdfIn PDF document text
    • https://cdn.sqhk.co/lulufebexefe/gfShggc/vanilla_cake_recipe_video_download.pdfIn PDF document text
    • https://bativajo.weebly.com/uploads/1/3/4/6/134662657/9974647.pdfIn PDF document text
    • https://nonibebufixaz.weebly.com/uploads/1/3/2/6/132682934/wufagorenevomub-pusuzixazoruj-zimoja.pdfIn PDF document text
    • http://degitowexara.iblogger.org/85721845663.pdfIn PDF document text
    • https://cdn.sqhk.co/xejadukoxeta/gaxifhO/64997595811.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403557/normal_601b245c5d676.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://losaxoxajav.epizy.com/1708711585.pdfIn PDF document text
    • http://basemamexirenaw.epizy.com/whats_on_arbys_turkey_gyro.pdfIn PDF document text
    • http://tumoxotakim.epizy.com/android_studio_alarmmanager_setexact.pdfIn PDF document text
    • http://rezumasalimod.epizy.com/proper_form_bulgarian_split_squat.pdfIn PDF document text
    • http://nebosudigijo.rf.gd/34625871065.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_off0000d8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B8 5068 bytes
SHA-256: a05aceb794df5cf1b516fe9d8cb8b970751c771e6078ebd9d86a5523c1fcb987
font_01_sfnt_off0000ea0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0D 10076 bytes
SHA-256: 3d897ec46fb11c6a5aae4ccabf20d125f265bea056534652f00b40c7aabbd71f