Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4e50d3b999d5e7b…

MALICIOUS

PDF

77.0 KB Created: 2021-02-25 18:28:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 813457f922712f060836f2cf49f8b61d SHA-1: a134e02a825a19188e7e5b8593779ab0fd784305 SHA-256: e4e50d3b999d5e7b44704fe07f2bfe5f19b2a1ee1a4dcfa2177dd2feefe3ae58
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are characteristic of phishing lures designed to redirect users to malicious sites.

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://seumenha.ru/award?keyword=how+much+does+a+supply+chain+coordinator+make PDF link annotation
    • http://taxevidel.medianewsonline.com/bokawadilatusu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408187/normal_5fddd068efeb7.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/wolejofoxotaturujukajore.pdfIn PDF document text
    • http://0fruit.space/dinosaurs_vs_aliens_filmavpva.pdfIn PDF document text
    • http://goproonly.com/junazoxawivabadelibavagf9ksi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_601f8a791f7a1.pdfIn PDF document text
    • http://fakaripeti.xyz/81194658355t68je.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490256/normal_5feef97d18826.pdfIn PDF document text
    • http://damvglaz2.xyz/steven_universe_future_wallpaper_hds6iv1.pdfIn PDF document text
    • http://gowanenutik.mypressonline.com/kisowife.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gafomawonerif.rf.gd/nuvemuzisamisef.pdfIn PDF document text
    • http://ponuruv.rf.gd/angry_birds_dream_blast_mod_apk_revdl.pdfIn PDF document text
    • http://xubewabe.epizy.com/49970064547.pdfIn PDF document text
    • http://boponewutizubi.rf.gd/40934189404.pdfIn PDF document text
    • http://wereguvepowu.epizy.com/38335604225.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_off0000ef0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0B 5532 bytes
SHA-256: 6c40f865e61bf7156aae7a6881e0c5f19db647e01be442edaf4472a4f070d93b
font_01_sfnt_off000101c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C3 10856 bytes
SHA-256: 973df4d0c3b057701254f445ac52b37b07520638eeb8308117e45ad37d29f2ce

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