Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbfa9548148f53b1…

MALICIOUS

PDF

71.2 KB Created: 2021-01-31 08:58:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b3f32b32935965a1885f96c91c63c38d SHA-1: 8f3bb911e12ff73d516ea8b72ccaad6759c71814 SHA-256: bbfa9548148f53b1d69f0d9800b72ca07fa4eaba35500d89e4df96a6a32cddf5
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the PDF structure itself is designed to redirect users to external, potentially harmful, 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://trafffe.ru/wb?keyword=herobrine%20mod%20mcpe%201.%2014 PDF link annotation
    • https://funofumid.weebly.com/uploads/1/3/4/8/134886651/zodezisiwud-pupefomef-sagaze-lagirod.pdfIn PDF document text
    • https://cdn.sqhk.co/migixurej/hgjbfPV/international_calls_nbn.pdfIn PDF document text
    • http://jowopejev.22web.org/cad_2013_full_crack_free.pdfIn PDF document text
    • https://metuliwilive.weebly.com/uploads/1/3/4/3/134386481/2794339.pdfIn PDF document text
    • http://vozaxakinexu.iblogger.org/apache_maven_3._6._0_for_windows.pdfIn PDF document text
    • http://menegatuje.iblogger.org/caveat_petition_format_supreme_court.pdfIn PDF document text
    • https://pekatube.weebly.com/uploads/1/3/5/3/135393066/kusunuputimejafof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pukafenofi.epizy.com/face_sheet_meaning.pdfIn PDF document text
    • http://funazowo.rf.gd/puvipujejizafewunasivu.pdfIn PDF document text
    • http://latowetutut.epizy.com/formelle_anrede_englisch_bewerbung.pdfIn PDF document text
    • http://gadudadu.rf.gd/pokagurumedanabosozuxa.pdfIn PDF document text
    • http://jilovin.epizy.com/adobe_photoshop_resume_template_free.pdfIn PDF document text
    • http://dorediludopa.epizy.com/pipozupinipofiwetok.pdfIn PDF document text
    • http://wilafavibu.rf.gd/baal_veer_3_video_mp4.pdfIn PDF document text
    • http://betiger.epizy.com/argus_wowhead_guide.pdfIn PDF document text
    • http://vetuvadoxawiton.epizy.com/42965936760.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_off0000d558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD558 5072 bytes
SHA-256: 502e9fdcf9697d4afef8b1a63eb06ea4b676c6ef09abaca70ccdeb6e7f59b2f6
font_01_sfnt_off0000e68e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68E 13024 bytes
SHA-256: e0cf715fe9e624a08d65066d2e6998ca1ee8e5c65cbe83d77639a20439327aa8

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