Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb8d3e1464d69c6d…

MALICIOUS

PDF

68.3 KB Created: 2020-12-13 14:53:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 02cf8a666edb2f58151bf34a3bd34ccb SHA-1: 840e3ab171d0c5d65536b761056c720528e9d709 SHA-256: cb8d3e1464d69c6da86184524d6039a1cc7255fbefa7866e090afbfb8795dc4a
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that leads to a malicious domain, identified by ClamAV and ML classifiers as a phishing trojan. The document body, though heavily obfuscated, contains strings related to games and the authoring application, suggesting a lure to entice users to click the malicious link. No scripts were extracted, but the PDF structure and URL are strong indicators of a phishing attempt.

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://traffnew.ru/strik?utm_term=shooting+unblocked+games+77 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f9c00f3a7238.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426423/normal_5fb599474f155.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0c66b27a199023ab4af32/t/5fc5fa1e4f98375720acb512/1606810143322/yogi_berra_stadium_events.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52e78bda9c57a97da122f/t/5fc9636d04e7723ed2f7bc0a/1607033710030/boxhead_zombie_game_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/survey_icons_faces.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc53974ff13940aa25be6a7/t/5fce0ae7662d5e24e0c898fb/1607338728228/teximasanuwuvipelasaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93cda184-c52e-4f57-8954-bf83538910aa/xezogusunasetimekefegonej.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/launch_android_emulator_android_studio.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/sonic_4_episode_2_apk_free_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc13cf30a2757459be51ac1/t/5fc2b68c9b1ed0353835b5bc/1606596238189/97708793525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30cf382d-a1bd-4a19-aeed-103c72a3dd41/documentum_tutorial_point.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c3d560f2895dc1e72903/t/5fc137afeaf37e3b64c83983/1606498223152/jo_malone_orange_blossom_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/243baa14-0333-41fa-9bb5-8726c57cbe3c/25813818164.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/kititerurikasola.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC80 5644 bytes
SHA-256: f522b11173432611fd1c32b59a61ec60a70170a3eaf0bc1f2cb6a3ff1a9e448c
font_01_sfnt_off0000df94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF94 10896 bytes
SHA-256: 8654f5c9ec97558e4353fb0a5c79c1f93ef997f32454e85a8c4c453af55c539b

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