Malicious PDF — malware analysis report

Static analysis result for SHA-256 4453733d4578de86…

MALICIOUS

PDF

71.3 KB Created: 2021-01-20 23:28:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-12
MD5: 1636fc0491353b67f5e3e9596a0ce1ac SHA-1: f743706c199f612205b0be96bab8fe49fc2ca2ba SHA-256: 4453733d4578de86a2366eadb791b5e1dc4ced4417f20a70340072a8fe134f26
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, and one specific URL that appears to be a lure for 'jellyfish live wallpaper hd'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

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://bologen.ru/wb?keyword=jellyfish%20live%20wallpaper%20hd PDF link annotation
    • https://site-1178527.mozfiles.com/files/1178527/walmart_davi_nails_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5f96377dba461.pdfIn PDF document text
    • https://cdn.sqhk.co/salijuvam/kgcN4hh/87003106532.pdfIn PDF document text
    • https://site-1167964.mozfiles.com/files/1167964/13152261308.pdfIn PDF document text
    • https://site-1168463.mozfiles.com/files/1168463/gokejo.pdfIn PDF document text
    • https://site-1196120.mozfiles.com/files/1196120/67410888378.pdfIn PDF document text
    • https://cdn.sqhk.co/vomuvojovi/eXihu3e/86410879084.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452154/normal_600611b5229c0.pdfIn PDF document text
    • https://site-1180216.mozfiles.com/files/1180216/block_puzzle_jewel_free_download_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390373/normal_5f97717a99025.pdfIn PDF document text
    • https://site-1168046.mozfiles.com/files/1168046/despite_and_in_spite_of_grammar.pdfIn PDF document text
    • https://site-1179698.mozfiles.com/files/1179698/didepiboreluxijelu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460447/normal_5fab84eeae8c1.pdfIn PDF document text
    • https://site-1172756.mozfiles.com/files/1172756/62578862728.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/kulinisokakewi/92264918799.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/89772299393.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/granado_espada_catherine_summoner_quest_guide.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_off0000db5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5D 5372 bytes
SHA-256: 3650fcd0942c81a5902db46c62e3222c5d2163b6e7059f726b464af60382624a
font_01_sfnt_off0000edbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBC 10120 bytes
SHA-256: be915ab57583aa6a7cd9b9f630100e31e599ae7a1e4c412973d0b18395ec9171

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