Malicious PDF — malware analysis report

Static analysis result for SHA-256 496e498c2e9f4908…

MALICIOUS

PDF

76.5 KB Created: 2021-02-15 20:36:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d894c0162ae0a89e10a21f9a1c135e0 SHA-1: 9fc91902e9e26565a1bbbd5f3129a94193acf0c0 SHA-256: 496e498c2e9f49085c6507f732184fd6b222d10977dda3b3cf69dedb4e126091
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of multiple embedded URLs, including one pointing to 'leonvi.ru', suggests a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wix?keyword=samurai+vs+ninja+samurai+jack
    • https://nafoxowozuvika.weebly.com/uploads/1/3/1/3/131383754/253ca516f.pdf
    • http://smotrikino.fun/maida_plant_project_reportrh4t1.pdf
    • https://cdn.sqhk.co/bitomasijelo/ligUsjf/dining_table_set_for_6_round.pdf
    • https://jiromozuno.weebly.com/uploads/1/3/5/3/135387519/184912.pdf
    • http://pomirkapa.site/poe_delve_achievements_guidecr3i7.pdf
    • http://chempion.coffee/75853973366i3u2j.pdf
    • https://damobupakul.weebly.com/uploads/1/3/1/4/131453350/ed44a.pdf
    • http://topmassage.net/edinburgh_tourism_reportonrgm.pdf
    • http://cheapkeys.site/war_kabir_bgm_ringtone_download_mp3yn7fc.pdf
    • http://lefegesitorezod.iblogger.org/sony_bravia_tv_manual_controls.pdf
    • https://digeforoxega.weebly.com/uploads/1/3/4/6/134668277/1863199.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1e3.bin
9266a1065efb8b7d85a298535dacec619704a5427eb201ac051de7f98bcdf04c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E3 5216 bytes
font_01_sfnt_off00010394.bin
1d30e21f3f338b23b2d43a264c09ac97f27b1213862974b3c2041f6d19940b14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10394 9888 bytes

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