Malicious PDF — malware analysis report

Static analysis result for SHA-256 2975bfaed5814ce6…

MALICIOUS

PDF

68.2 KB Created: 2021-02-12 01:48:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: cf64934fd0442c8bb972904abe32da95 SHA-1: 5d7928df44dde17a93a3e699c87c5166226187d4 SHA-256: 2975bfaed5814ce618f7fe974278bf0c2f51df8925997cb59b1a65c997705cf6
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/wix?keyword=aunt+marge+harry+potter In PDF document text
    • https://cdn-cms.f-static.net/uploads/4402267/normal_5fd0b561deb01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420927/normal_60177115121e8.pdfIn PDF document text
    • http://sulelufisumi.iblogger.org/tropical_leaf_template.pdfIn PDF document text
    • http://kogiwonewaveg.iblogger.org/6062042912.pdfIn PDF document text
    • https://cdn.sqhk.co/zebapomiz/fVhb2hg/asphalt_nitro_8_airborne_mod.pdfIn PDF document text
    • http://smilex.club/cedric_villani_birth_of_a_theoremw20zt.pdfIn PDF document text
    • http://revershjtb.site/nufajukitavozoteppo11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464070/normal_600ded4ba7ee9.pdfIn PDF document text
    • http://tifizifojaf.iblogger.org/soluble_and_insoluble_salts_report_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/gvjcgen/xelerit.pdfIn PDF document text
    • http://zumbayuliya.online/fixan1zu3d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://damatagowigiz.epizy.com/1591625857.pdfIn PDF document text
    • http://rajunuximu.epizy.com/63778162634.pdfIn PDF document text
    • http://sumafalonedap.rf.gd/xifipitun.pdfIn PDF document text
    • http://jutenudolis.epizy.com/coinbase_pro_app.pdfIn PDF document text
    • http://palakojum.rf.gd/formal_dress_shops_spanish_fort.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_off0000cf5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF5D 5112 bytes
SHA-256: 6d9674876be8b57f7e27530eddebdc1e275ab4896d8866dc94ffea99ead48c6c
font_01_sfnt_off0000e09d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09D 10340 bytes
SHA-256: f512b8db0d4d3038bc20fed5d2d350154c79688be693c2e512f25ca92e9cb87d