Malicious PDF — malware analysis report

Static analysis result for SHA-256 76c3e3980edb8b21…

MALICIOUS

PDF

208.0 KB Created: 2021-02-16 05:06:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d2fc10cc13bce0d0a826855868480f23 SHA-1: bffbc7800f29829c8550c4f0af327298828c5201 SHA-256: 76c3e3980edb8b219272bc42bc07114dc67361856b77eafcb01527759b9a671f
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://maypoin.ru/wix?keyword=words+starting+con', which is likely part of a phishing or malware distribution scheme. The document body appears to be obfuscated or corrupted, preventing a clear understanding of its specific lure, but the presence of the malicious URL strongly suggests a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9851

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wix?keyword=words+starting+con PDF link annotation
    • https://wolapegod.weebly.com/uploads/1/3/0/7/130776073/xirenu_xosiril.pdfIn PDF document text
    • http://dsv-trening.ru/chitta_veet_baljit_songd993t.pdfIn PDF document text
    • http://gradstroy.su/absceso_hepatico_en_pediatria_revisionfs0kf.pdfIn PDF document text
    • https://xoxekoxezugox.weebly.com/uploads/1/3/0/7/130738790/tarefutevopux_vuwit.pdfIn PDF document text
    • http://republvinb.fun/super_smash_bros_brawl_100_save84t0i.pdfIn PDF document text
    • http://sokfresh.fun/mobalewefi4fiuu.pdfIn PDF document text
    • http://gikisivota.iblogger.org/7813609396.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501501/normal_5ff4c2de3d193.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/7YJW7hh/58253555973.pdfIn PDF document text
    • https://livadasim.weebly.com/uploads/1/3/4/3/134312527/d6d8fd52ad6a0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410443/normal_5fd97979cddcc.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/kukupunopedon/korean_visa_application_form_file.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/maintain_or_guard_temporarily_crossword_answer.pdfIn PDF document text
    • http://gemosufijubimup.epizy.com/crime_patrol_2019_hd_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/chrome_old_version_for_windows.pdfIn PDF document text
    • http://rivadejupogutun.epizy.com/koro_sensei_human_form.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002ef6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF6E 3172 bytes
SHA-256: f860b04d6a9da47050c967a985c1ff53cbab43bd751f21cf366f3cbe96eda618
font_01_sfnt_off0002face.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FACE 5088 bytes
SHA-256: 542f0c2351051f74b73e42d3560326ffa5be8d15b7c5d0ca533b1061fc0a3d29
font_02_sfnt_off00030c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C39 10716 bytes
SHA-256: a2a4e83c9fa203987c001a0c1f20877ec897c61c63c86f18a5c4e4f30a4773a1

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