Malicious PDF — malware analysis report

Static analysis result for SHA-256 74b9308242a87880…

MALICIOUS

PDF

126.7 KB Created: 2021-03-22 14:10:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fedb669c017fae371b5597c4a5ad2acf SHA-1: 98ff0313bad4b4717b55a6ffc2741d99286e87ff SHA-256: 74b9308242a878802ff1d9c122fb56268214dea04e8c817eaf55fd5de1bc2af9
226 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://druttle.ru/aws?utm_term=can+timex+indiglo+be+repaired PDF link annotation
    • https://mifadumuvuvog.weebly.com/uploads/1/3/4/6/134689338/51519ae55a8393.pdfIn PDF document text
    • http://mijudivoxobo.iblogger.org/42084293276.pdfIn PDF document text
    • https://cdn.sqhk.co/zixemoliz/idB3gjx/machinarium_demo_full_version.pdfIn PDF document text
    • https://zupuraba.weebly.com/uploads/1/3/5/3/135348036/1405224.pdfIn PDF document text
    • https://fodenipijuf.weebly.com/uploads/1/3/4/6/134618914/df9fd2626b6adf.pdfIn PDF document text
    • http://semazolowogafoj.22web.org/48242121653.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378848/normal_5fcf49c901a36.pdfIn PDF document text
    • https://dopilefuma.weebly.com/uploads/1/3/4/7/134733068/buberadunufudajuxi.pdfIn PDF document text
    • https://cdn.sqhk.co/wugoselubiki/Hjhe2gd/podisadezipurotigulewo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456389/normal_5ff8f0cc2968d.pdfIn PDF document text
    • https://cdn.sqhk.co/netimupoxojo/Tt0UjdC/zogorefojemiwuse.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_6052ae2b58db9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rimutapewite.rf.gd/sijogegipogupibana.pdfIn PDF document text
    • https://a86b13d2-a9ad-4039-ad74-10d2f7332aba.filesusr.com/ugd/6e2451_6f4bd9d37f25472a9aee7673334afffe.pdf?index=trueIn PDF document text
    • http://zevizajezu.epizy.com/32666703190.pdfIn PDF document text
    • http://zobabof.epizy.com/nulepalof.pdfIn PDF document text
    • https://e1318bff-d970-45e2-bcea-45481503a18b.filesusr.com/ugd/75a96d_3033a7441d334de08df3b85ba19fba90.pdf?index=trueIn PDF document text
    • http://fujatelet.epizy.com/kukexekirapokajupif.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_off0001ae99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE99 5216 bytes
SHA-256: 15c0f605f50d5841ed21ac438053d36e68ad7ff03eba819428cc97190eb91ae8
font_01_sfnt_off0001c03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C03A 13664 bytes
SHA-256: aab77656769f357e6812167bfc5a08ecee679382cea1aa390a7a2a7fed7b7e92

Open this report in the interactive analyzer, or submit your own file for analysis.