Malicious PDF — malware analysis report

Static analysis result for SHA-256 d86ee23e09f3c4ff…

MALICIOUS

PDF

77.9 KB Created: 2021-02-10 19:39:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8c0c77f133edb57c870866231f8a8aa1 SHA-1: c0c400423c6707145f77fc1457b9479ef56052aa SHA-256: d86ee23e09f3c4ff50bb2fec6f0bdd705587ab71784f6978ba2b5ace0be2d657
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'seumenha.ru', which is likely a malicious domain used to host phishing content or distribute malware. The document body, though heavily obfuscated, contains keywords related to software downloads, reinforcing the phishing or malware lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://seumenha.ru/wb?keyword=omegle%20tv%20apk%20para%20android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469350/normal_60124336344d3.pdfIn PDF document text
    • https://cdn.sqhk.co/vavewiminiv/iig9hhi/74350658650.pdfIn PDF document text
    • http://torchland.xyz/foseremodomj0n3.pdfIn PDF document text
    • https://cdn.sqhk.co/xumelesep/jcgcjjU/msn_messenger_download_mac.pdfIn PDF document text
    • http://jumpfs.space/arkit_3d_file_formatybori.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/didVvgj/fast_news_today_malayalam_live.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448744/normal_5fe5d1cf3679a.pdfIn PDF document text
    • http://ooovseanalizi.ru/the_burnout_societyc9ioa.pdfIn PDF document text
    • http://com-signto2.xyz/calligraphy_letter_template719hy.pdfIn PDF document text
    • https://cdn.sqhk.co/vosiwuli/Wf7jeQQ/defence_application_process.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/xeroguru/34614397511.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/amazon_music_app_android_auto.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/riduwawadewowifu.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/itunes_for_laptop_windows_10_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/genero_narrativo_ejemplos.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/feasibility_report_of_fish_farming.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/check_point_vpn_latest_version.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/abbyy_finereader_9._0_sprint_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/cadette_media_journey_book.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/tujanufibivejitepu.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/nawemisaz.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/kinazexisakanatozus.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC5 5252 bytes
SHA-256: b667fd062d78d35ee3b7f9afa2902386c7963f1ee021a41db1b4d526f99a3542
font_01_sfnt_off0000ef93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF93 10404 bytes
SHA-256: fc896d263223bcd5bfdc3adc51b05dd1e48cb23c876613f471b2fe23efcd363d
font_02_sfnt_off0001130c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1130C 16608 bytes
SHA-256: b30e2764b8f0175f246ff9a5d3a2ec84b4221cca29b6c3f7290087aa060a8742

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