Malicious PDF — malware analysis report

Static analysis result for SHA-256 b61a70d48244dbed…

MALICIOUS

PDF

67.0 KB Created: 2021-02-07 01:53:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: f01254c77c698be9f709092d5c0b4297 SHA-1: 1b3becf11a128c642674dd1e6130fa8de3c3e780 SHA-256: b61a70d48244dbed6f9e5bf9b9692bb0c3420325a6d6ebbff5b73707d2dab5e0
126 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://baarspo.ru/123?utm_term=naming+molecular+compounds+chem+worksheet+answers PDF link annotation
    • http://ins.expert/stick_ranger_bows6mkym.pdfIn PDF document text
    • http://devlp.design/48815293948qkiz1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385437/normal_600bf0af64ea3.pdfIn PDF document text
    • https://cdn.sqhk.co/tofegejij/vihsWgf/kovasoxepeweruxediviwera.pdfIn PDF document text
    • http://0fruit.space/50781946717fmbh2.pdfIn PDF document text
    • http://mazanatur.space/topoxadisufedayiqg3.pdfIn PDF document text
    • http://wwwbcpzonasegura-viabcp.com/95309364294p8pdo.pdfIn PDF document text
    • http://gufutaca6.xyz/lopisuxogatifagukevmzisz.pdfIn PDF document text
    • http://springital.fun/28374551215hivti.pdfIn PDF document text
    • https://cdn.sqhk.co/latosagax/gCjhhvM/horror_skins_for_roblox_xbox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369334/normal_5fc7ec7371d05.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/zovopok.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/68705103738.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/song_almost_forgot_against_the_current.pdfIn PDF document text
    • http://jenesigafepi.epizy.com/8174814954.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_off0000ca08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA08 5612 bytes
SHA-256: ce27e20fe54dbfb108fe91f581b68359270fce99ecaff52252d41fe84a3168b9
font_01_sfnt_off0000dd0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0A 9920 bytes
SHA-256: d165f5b1d5c4d6267577d8719e11200625bc15e96ff052ccf82e7fbcc9e9eeb7