Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce7a202ee95ce4a…

MALICIOUS

PDF

74.4 KB Created: 2021-02-27 20:48:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f4037368986bfa33b0fdd11b994b5003 SHA-1: b55563c335d6f43663225e2dc3b51ae51d81bb36 SHA-256: fce7a202ee95ce4aaf5df5eeb772038bf5ad2fed804fe0ad9901eb22e90e36e4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which are hosted on disposable or link-farm-like services. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO spam. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to 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://kuzutuzo.ru/wix?keyword=logos+advertising+slogan PDF link annotation
    • https://fisulujat.weebly.com/uploads/1/3/1/4/131454297/puvagu.pdfIn PDF document text
    • https://wojopegoguw.weebly.com/uploads/1/3/4/6/134690206/rivenabo.pdfIn PDF document text
    • http://sakekoduside.iblogger.org/most_irritating_alarm_tones_free.pdfIn PDF document text
    • https://jefiwoso.weebly.com/uploads/1/3/5/9/135996081/bomimeju.pdfIn PDF document text
    • http://pixelbarista.com/el_estandarte_de_urjldf6.pdfIn PDF document text
    • https://puganijososas.weebly.com/uploads/1/3/1/8/131871778/linur_nikatepoxub_batepoxu.pdfIn PDF document text
    • http://gapilojazixo.getenjoyment.net/how_to_setup_wireless_printing_on_hp_officejet_pro_8610.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vawerudarasikow.myartsonline.com/17288939739.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/66080575342.pdfIn PDF document text
    • http://dekifovep.epizy.com/blank_world_political_map_free.pdfIn PDF document text
    • http://sotexazonilot.rf.gd/easy_duplicate_finder_license_key_5.22.pdfIn PDF document text
    • http://bunetexugefu.rf.gd/52317049551.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/download_foxit_phantompdf_full_crack_for_mac.pdfIn PDF document text
    • http://xuxedawijepi.rf.gd/79105640592.pdfIn PDF document text
    • http://goromanoza.rf.gd/sogokikijabu.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_off0000e7d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D4 4992 bytes
SHA-256: cfe98b2eb43510452381a511ed62d828a4ff17d34839c82c45e4192f214fcf01
font_01_sfnt_off0000f8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E9 10616 bytes
SHA-256: ef057ab1a53b0c7157f3ac1d7a125903a5d5dce7ddfbc76c17f6d2eae1dbe0fd

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