Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef3daf1e01436eed…

MALICIOUS

PDF

76.3 KB Created: 2021-03-06 06:24:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8bea90f9943a782a5f7a6ac5cb2e7e56 SHA-1: cef55e8d1beb844860e99b69f044612043b43f8e SHA-256: ef3daf1e01436eed8f1886b269934db53417ee37afefb9e91a50227bdd6a1406
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL that appears to be part of a phishing lure, disguised as a search result. While no scripts were directly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/award?keyword=romeo+juliet+quotes+baz+luhrmann PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416919/normal_6019fb6451f80.pdfIn PDF document text
    • https://cdn.sqhk.co/detobero/KwgeggI/vofataweraxexozeli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414866/normal_5fe9d52e59393.pdfIn PDF document text
    • https://cdn.sqhk.co/dameseri/hfDgiyy/adventure_escape_murder_inn_cheats.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/50626126071.pdfIn PDF document text
    • https://cdn.sqhk.co/murerezusa/7hDjif9/xasurofopikeregixusosuj.pdfIn PDF document text
    • https://cdn.sqhk.co/mebinolopuf/5PhhdzO/melevegakave.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387229/normal_5fd8332c7dd31.pdfIn PDF document text
    • http://goligofalu.medianewsonline.com/11423536160.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/vovabagubajegeb/a_level_economics_revision_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/wevuw.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/86834148814.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/acselerator_quickset_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/pisiform_bone_hand.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/gukikedemotimegofusibi.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/mokugorifonaxujo.pdfIn PDF document text
    • http://baxewape.myartsonline.com/how_to_open_java_swing_project_in_eclipse.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/champion_aviator_watch_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/50355293054.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/counter_strike_nexon_non_steam.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_off0000ee61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE61 5324 bytes
SHA-256: 866ceeb69991977809ea7d67a775b0752876630603db950001aadf557728ae83
font_01_sfnt_off0001005f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005F 10476 bytes
SHA-256: 7d5f5df071f7da6e48438c0fca7335ac4078e65232fab54efb562045f0c94e07

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