Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e848334acbae53f…

MALICIOUS

PDF

81.8 KB Created: 2021-02-28 21:17:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 540aeb95ec36731d147369cc1e8de929 SHA-1: e4b9da63c9139a1dd60314581e798df594d9bf3f SHA-256: 0e848334acbae53f98cf2eb4429dcfe6bcdafa10fa5f232e80e6caab1d8e4b2e
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. The embedded URL `https://vilenefex.ru/123?utm_term=the+most+dangerous+game+movie+2020+where+to+watch` suggests a phishing or social engineering lure, likely attempting to direct the user to a compromised website. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document, possibly leveraging embedded JavaScript for exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/123?utm_term=the+most+dangerous+game+movie+2020+where+to+watch
    • http://omerkatanalp.com/64350675749boo2l.pdf
    • http://servicesforsupport.com/the_understatement_of_the_year_epub64rye.pdf
    • https://cdn-cms.f-static.net/uploads/4385422/normal_6034535619e06.pdf
    • https://static.s123-cdn-static.com/uploads/4392661/normal_5fdf94210b933.pdf
    • https://cdn-cms.f-static.net/uploads/4383692/normal_6014baf94b226.pdf
    • https://suzavopuwo.weebly.com/uploads/1/3/4/6/134686694/nuxanevolamup.pdf
    • https://static.s123-cdn-static.com/uploads/4389586/normal_5ffcbc10976e5.pdf
    • https://titajava.weebly.com/uploads/1/3/4/0/134096001/4911325.pdf
    • http://changepass.online/42641390506ojdbs.pdf
    • https://static.s123-cdn-static.com/uploads/4460972/normal_5feb78f0a83b2.pdf
    • https://cdn-cms.f-static.net/uploads/4501214/normal_603b0262dc0ac.pdf
    • https://static.s123-cdn-static.com/uploads/4452381/normal_5fcdfd4f196c7.pdf
    • https://static.s123-cdn-static.com/uploads/4453118/normal_5ffdd44373729.pdf
    • https://sozatoma.weebly.com/uploads/1/3/4/4/134484551/5660288.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/didowugorokirug/frigidaire_refrigerator_replacement_parts_door_handle.pdf
    • https://s3.amazonaws.com/zarusegibitumet/foledojuwezamufob.pdf
    • https://s3.amazonaws.com/dakebesuvum/light_my_fire_piano_sheet_music.pdf
    • http://maguzuj.rf.gd/mercurial_cheat_sheet_for_git_users.pdf
    • 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_off000102de.bin
0e1ccc1988418b4c8d66979740fe2d9f68537e4e73091b50eb191d831354ecd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x102DE 5696 bytes
font_01_sfnt_off00011626.bin
b2234a18128c22422bf2c5844edfd852a5818c870a4704455a5442a6716e3dac
pdf-font-stream PDF embedded font (sfnt) at offset 0x11626 10504 bytes