Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eb8f8c2a025c1fd…

MALICIOUS

PDF

69.9 KB Created: 2021-02-05 20:19:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0661706defcb816e4faef218e126c18c SHA-1: 0d574d77cc59b46fd5106885a677fe189dc5ab08 SHA-256: 4eb8f8c2a025c1fde2f004b06b8e4f3186cd8c3f5af5b65f1c8f997be467985b
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one specifically pointing to a domain that appears to be a link farm designed for SEO manipulation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or redirection to a malicious site. Although no scripts were extracted, the presence of numerous external links and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggest a pattern of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/wb?keyword=como%20convertir%20un%20pdf%20a%20word%20nitro PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367310/normal_5fe1cd9b0fc19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478655/normal_600f13ce8202e.pdfIn PDF document text
    • http://vejofewi.iblogger.org/fuzep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368477/normal_5fe59962166b5.pdfIn PDF document text
    • http://milanomodaitaly.site/wilderness_survival_kit_listmudu1.pdfIn PDF document text
    • http://gajikabe.iblogger.org/uscg_aux_uniform_presentation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483604/normal_5fdbc4bed7f7f.pdfIn PDF document text
    • http://fowirunuwajuk.iblogger.org/story_of_my_life_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447097/normal_5febc93c1350a.pdfIn PDF document text
    • http://zuraribofib.22web.org/kranjska_gora_snow_report.pdfIn PDF document text
    • http://niludop.22web.org/android_phones_in_pakistan_under_15000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422372/normal_5fd8bcd5e5a88.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xubudexev.epizy.com/hey_brother_chords.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_off0000d3eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3EB 5148 bytes
SHA-256: 37055b7877c459f9f4aca8ae37986ad76d2b72ab8be44b6f68cd3cf488950e4d
font_01_sfnt_off0000e56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56F 11420 bytes
SHA-256: dc21034de166b9fbe1e15937573a96bf4e0199908e54fed451549b1f35674921

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