Malicious PDF — malware analysis report

Static analysis result for SHA-256 23e90b8fc72e9d17…

MALICIOUS

PDF

69.3 KB Created: 2021-02-17 10:42:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 7e5dc30179bbb8dd0413aae86f5050dd SHA-1: 802f8e00e2eea3b19f5e4bbddab71700de92e353 SHA-256: 23e90b8fc72e9d1745f9a3fd427446212c0d4b1ba7e92bad031d669768d43f78
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=computerised+database+advantages In PDF document text
    • https://wusulanapezuvu.weebly.com/uploads/1/3/4/3/134325740/pavefejileporumog.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzaxube/vhe9hcz/71777575287.pdfIn PDF document text
    • https://tunawirivam.weebly.com/uploads/1/3/1/4/131437064/wepemitemi.pdfIn PDF document text
    • http://ttop-shop.com/36224865246crk3g.pdfIn PDF document text
    • https://cdn.sqhk.co/kesusevuzep/gfmigjc/62717620982.pdfIn PDF document text
    • http://damvglaz6.xyz/extra_utilities_2_filteri4ds4.pdfIn PDF document text
    • https://cdn.sqhk.co/nezerozara/vmjfkJI/94441848044.pdfIn PDF document text
    • http://tapikival.22web.org/whatsapp_pc_software_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/pojizurigos/jcYWzig/pawezafisumisaze.pdfIn PDF document text
    • http://gutprod.xyz/ludedibasibojanamiwx3lg6.pdfIn PDF document text
    • https://wuzikixow.weebly.com/uploads/1/3/0/7/130775075/tubatifis-dexutan-tubisewul-wazirojasijubo.pdfIn PDF document text
    • http://omynutural.space/zoremudigubipujolekukosuj1bkhx.pdfIn PDF document text
    • https://wuzakadebetes.weebly.com/uploads/1/3/0/8/130814976/8648793.pdfIn PDF document text
    • https://fetevosave.weebly.com/uploads/1/3/1/4/131438058/wegatuno-jujokebagusevu.pdfIn PDF document text
    • http://ueuniti.xyz/85199199337pgros.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buvodadixasiz.epizy.com/abba_andante_andante_piano_sheet_music.pdfIn PDF document text
    • http://fimaxopazeviv.rf.gd/26920066271.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/36553163386.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_off0000d2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D4 5352 bytes
SHA-256: 313fa6be24aaec77d2d101e03195ddfd471b226c76e7e154d5187721d6ec9cc4
font_01_sfnt_off0000e4eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EB 10236 bytes
SHA-256: c77f1962fb8352e108c93c21789e6b72ccbb49637673060837ae1a218db29323