Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec4ce4f110653b09…

MALICIOUS

PDF

89.0 KB Created: 2021-05-09 15:26:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 4dfe6ae52215710076630a080c2bc1b3 SHA-1: 5f2a5f86ee4e7234e7dcdef9026153b29ad3ff86 SHA-256: ec4ce4f110653b09dcbf1b838ba549aad7fcefc7f88b6ba86ba4356ab70432a9
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious content. The document body and embedded artifacts suggest it functions as a link farm, directing users to various external URLs, some of which are hosted on disposable domains. This pattern is consistent with phishing or malware distribution attempts.

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://leonvi.ru/strik?utm_term=what+does+the+jail+cell+symbolize+in+monster PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443619/normal_601563657e8ba.pdfIn PDF document text
    • http://seomagnat1.online/pasteurization_processw90g6.pdfIn PDF document text
    • http://parrrtner.xyz/45684820811amxf3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494136/normal_5ff7e4b7834f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371788/normal_604e812e8ffe4.pdfIn PDF document text
    • http://dimax.website/jifinivopenege7yj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389384/normal_60096bd884e84.pdfIn PDF document text
    • https://cdn.sqhk.co/nokulebepoba/dgfjc7j/leatherface_texas_chainsaw_massacre_1974.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/dHggrid/48520784945.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415322/normal_6064a8918d44d.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/fkgfcIH/linking_verbs_definition_for_grade_3.pdfIn PDF document text
    • http://dvigatel.guru/rixibatapk2j7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tijiwef.epizy.com/verbo_aller_forma_negativa.pdfIn PDF document text
    • http://maxefaronuxugur.epizy.com/kitchenaid_artisan_mini_5ksm3311xbbm_3.3-litre_stand_mixer_black_matte.pdfIn PDF document text
    • http://lumigetutiburu.epizy.com/92225068490.pdfIn PDF document text
    • http://pubometev.rf.gd/ad_hoc_reporting_tools_comparison.pdfIn PDF document text
    • http://vokutikomewesud.epizy.com/fogifex.pdfIn PDF document text
    • http://widitedofirok.rf.gd/venn_diagram_template_with_lines.pdfIn PDF document text
    • http://bilovero.rf.gd/fulisofuwufodusagosir.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001088c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088C 5560 bytes
SHA-256: 9d6ac9e47f53e01ddc8e6f37775c91227917274e56d81c73e0253db6e768ae44
font_01_sfnt_off00011b69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B69 10944 bytes
SHA-256: 34391206a57d89b9dbbe28ec0a29f66c9ad5d95b7af7bc650a5db17e01fc63fe
font_02_sfnt_off000140cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140CD 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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