Malicious PDF — malware analysis report

Static analysis result for SHA-256 b732d3d35344dc7f…

MALICIOUS

PDF

67.7 KB Created: 2021-02-16 10:17:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 8ab064be9eb312c33ba594e6e6405ff5 SHA-1: 9646a12376b281f39a2aed9d62bb327893bcbc84 SHA-256: b732d3d35344dc7fa11fecf68d0af4b9d45fe00cb4ed51040b35b96a623e075b
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://crophysi.ru/wix?keyword=yo+go+verbs+practice In PDF document text
    • https://cdn-cms.f-static.net/uploads/4402721/normal_6029ce849d87c.pdfIn PDF document text
    • https://kerobasoxegetun.weebly.com/uploads/1/3/4/0/134017970/bb8500623f3d.pdfIn PDF document text
    • http://xuxuvojetuzutej.iblogger.org/dinijaguduroboxeged.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369486/normal_5fc9a4928554c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446152/normal_5fce00beddb8b.pdfIn PDF document text
    • http://dawuxapi.iblogger.org/fowebivavizagaxej.pdfIn PDF document text
    • https://bamopinusomuna.weebly.com/uploads/1/3/1/3/131379567/a13c1.pdfIn PDF document text
    • https://nabisomo.weebly.com/uploads/1/3/5/9/135993280/d0b1fb7a92ded.pdfIn PDF document text
    • http://vukogosapejofa.iblogger.org/18363389719.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nupuzasig.epizy.com/katya_elise_henry_workout_plan.pdfIn PDF document text
    • http://vaterojot.epizy.com/jbt_tet_answer_key_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/pexawesad.pdfIn PDF document text
    • http://madukavinoxonal.epizy.com/1955013388.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/candy_crush_saga_apk_unlimited_everything.pdfIn PDF document text
    • http://mujasanowagug.epizy.com/nakenimipesasijanizi.pdfIn PDF document text
    • http://lugimes.epizy.com/australian_tax_invoice_template_excel.pdfIn PDF document text
    • http://meridupomosim.epizy.com/18239556270.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_off0000cba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA3 5232 bytes
SHA-256: a1ecd76794bc44bf1c13bf82abd88f486172ecb6682525899332b8efa16360c8
font_01_sfnt_off0000dd8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8B 10268 bytes
SHA-256: 73df67aeb0507a2a4583ef2da294bd90af22a112df593635fd8e1df962580704