Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f33a137fcb6da20…

MALICIOUS

PDF

83.2 KB Created: 2021-03-16 00:59:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba92e6b9add2661689cbb2c867629f3b SHA-1: 5716b4cec32ab3b41b4c5b9c84b787d2e089604e SHA-256: 4f33a137fcb6da20b3164d233e6408be9fb2e40f948048d9dfda5a0f4844bac7
96 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL `https://leonvi.ru/wix?keyword=star+girl+hack+no+survey+2014` strongly suggests a phishing or scam attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI are sufficient indicators of a malicious document.

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=star+girl+hack+no+survey+2014
    • https://cdn.sqhk.co/wipedekis/hciid9y/ntt_indycar_schedule_2021.pdf
    • http://guitar.su/justin_bieber_all_songs_zip_file16ezw.pdf
    • https://static.s123-cdn-static.com/uploads/4407060/normal_5febc4078ea69.pdf
    • http://vakiduweg.mygamesonline.org/87999927239.pdf
    • https://static.s123-cdn-static.com/uploads/4458849/normal_6003153c5b5df.pdf
    • https://cdn.sqhk.co/visobipibe/i3iejbv/29766908598.pdf
    • http://gefosezidubajoz.scienceontheweb.net/28681653986.pdf
    • https://cdn-cms.f-static.net/uploads/4460944/normal_604f36b3a338d.pdf
    • http://tonukavugu.mygamesonline.org/learning_opencv_3_o_reilly.pdf
    • http://katermore.ru/how_to_repair_a_remote_control_helicopter9nidt.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/5366dd17-758d-49cf-9741-a62ed6dfc253/diy_dillon_650_autodrive.pdf
    • https://uploads.strikinglycdn.com/files/a099a4b0-3cdb-425b-9922-08ed782aec8b/bob_revolution_single_stroller_weather_shield.pdf
    • https://uploads.strikinglycdn.com/files/8bd2bb3d-1cd6-4b20-8b3a-8eac9681afe1/60854274236.pdf
    • https://s3.amazonaws.com/novifamigot/basic_mathematics_uon.pdf
    • https://s3.amazonaws.com/xapijifas/percy_jackson_books_in_order_after_the_last_olympian.pdf
    • https://s3.amazonaws.com/kefefetafij/44323192810.pdf
    • https://uploads.strikinglycdn.com/files/e280b864-9185-4956-9b57-0e02a8e2f613/cateye_cycle_computer_reviews.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • https://itunes.apple.com/sg/app/star
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f707.bin
75ec64dfe736af7de38489050bfd181e5e3d0a3ad1342db9b5e37a03c8129b44
pdf-font-stream PDF embedded font (sfnt) at offset 0xF707 5684 bytes
font_01_sfnt_off00010a63.bin
9d1b0c3eaea1299aee29511b17f26289c305cdb04ae0673ef514b23050190cf7
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A63 11084 bytes
font_02_sfnt_off00013023.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x13023 4324 bytes