Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fdb6f56bb813976…

MALICIOUS

PDF

79.5 KB Created: 2021-05-14 20:13:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9b55ea9c9132e075895399df3fb2ef1d SHA-1: 191682221944d088d8029f87bcd6d6afbfcb61f8 SHA-256: 0fdb6f56bb8139763b97c8a097a2bf9e006e5746bed30d9462978189576082e6
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content or phishing sites. The presence of external URIs and the 'link farm' heuristic strongly indicate a phishing or malware distribution attempt.

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://maypoin.ru/strik?utm_term=my+family+and+other+animals+2005+full+movie PDF link annotation
    • https://cdn.sqhk.co/barugogip/TUqi1hB/ludo_neo_classic_download_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/sanevujaguda/djfHlia/vugufemopifevusetugimod.pdfIn PDF document text
    • https://cdn.sqhk.co/xajamenujo/SNTtged/20784535867.pdfIn PDF document text
    • http://salukapebuke.iblogger.org/65769000525.pdfIn PDF document text
    • http://garanibukumom.scienceontheweb.net/musewusinimon.pdfIn PDF document text
    • http://wowevopopof.22web.org/katerepadapidaxujiza.pdfIn PDF document text
    • https://cdn.sqhk.co/fapulelenuvi/HhdpF7E/xivododeruvajumelufo.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/benuka/kimazexevak.pdfIn PDF document text
    • http://mogonowipekizo.epizy.com/dokorugigew.pdfIn PDF document text
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_e2a52c1bbe164e8a8850f03caff78d33.pdf?index=trueIn PDF document text
    • http://jitawidavez.atwebpages.com/sociology_of_law_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/pemuravutanilutusovawan.pdfIn PDF document text
    • https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_71d9a21d1ccb494684df5a23e35a5666.pdf?index=trueIn PDF document text
    • https://9df6e0af-a028-4e88-91ba-61a1b37318d5.filesusr.com/ugd/7c1f05_f6c9b8b7f5fa447f9a01be6af389b3b3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/befafuni/bodas_de_sangre_resumen_por_actos_rincon_del_vago.pdfIn PDF document text
    • http://midetimekewawa.epizy.com/antimicrobial_stewardship.pdfIn PDF document text
    • https://74269c25-1731-4359-90d4-804f54ef9c1c.filesusr.com/ugd/b5973a_e70770b8a0344022accd2c4fcaedec30.pdf?index=trueIn PDF document text
    • http://watidoterer.epizy.com/13563342777.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_off0000f769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF769 5712 bytes
SHA-256: 5293e2738b44b52a0e4580a70a0952b1e5252287cea5b08bb865967a214a8151
font_01_sfnt_off00010aca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACA 10980 bytes
SHA-256: db56b4bd43f38422dea7ca12270fd6708937a9616c9d488caf1538ba80f75295

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