Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee504fb1bab97978…

MALICIOUS

PDF

75.9 KB Created: 2021-03-29 00:32:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac30898b9e529872634d521e02c0af79 SHA-1: 90f007d96b0ef48553e4752729e52e485005f3ca SHA-256: ee504fb1bab97978e21325fb2637aab28863780f85668ac375f3c3e36e99fa48
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL suggests a phishing or malware distribution attempt, disguised as a document about mathematics. No scripts were extracted, but the PDF structure and external URL point towards a phishing lure.

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://pelibifir.ru/wix?keyword=discrete+and+combinatorial+mathematics+pdf
    • https://cdn.sqhk.co/fodibaniwe/gcI0ja2/stadia_premiere_edition_bundle_review.pdf
    • https://cdn.sqhk.co/jasolizilaf/hchesjh/reading_comprehension_practice_sheets_3rd_grade.pdf
    • https://cdn.sqhk.co/jagojixego/TqjhJif/nfl_fantasy_football_rankings_2020_by_position.pdf
    • http://xibawolafubiz.getenjoyment.net/86569526522.pdf
    • https://cdn-cms.f-static.net/uploads/4476270/normal_6012dd322413d.pdf
    • https://cdn.sqhk.co/jawutuwek/he8hed7/bitcoin_wallet_app_android_free_download.pdf
    • http://papawugamajube.mygamesonline.org/33114040588.pdf
    • http://molufipet.sportsontheweb.net/anemia_falciforme_em_pediatria.pdf
    • https://cdn.sqhk.co/dedomafub/f6hovhf/turn_off_roaming_on_samsung_gt_s5230.pdf
    • https://cdn.sqhk.co/godidudawat/ichi5m9/crackshooter_set_insanity_flyff.pdf
    • http://nosixavol.sportsontheweb.net/rainbird_5000_sprinkler_head_adjustment.pdf
    • https://cdn-cms.f-static.net/uploads/4383561/normal_60327ee6682c3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/e756e0eb-7919-41e8-a4ae-e4668603bbca/how_to_use_zoom_h4n_pro.pdf
    • https://uploads.strikinglycdn.com/files/aad81326-79b5-40b2-8e3c-81244b80a7a0/gifamamenawokidu.pdf
    • https://uploads.strikinglycdn.com/files/7e1f6f0d-568b-4e32-9742-7f40018735fe/the_riveras_season_4_episode_1_full_episode.pdf
    • https://uploads.strikinglycdn.com/files/8082133c-efab-44bd-bc56-933b4141b220/82167902236.pdf
    • https://uploads.strikinglycdn.com/files/07846950-dfa8-4edf-8600-f513f23ec47e/89202994004.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de6a.bin
30f5422c51f9e0e1d66b992923e440ac69bc8fcca87b82dc3cd6664df14a9fb6
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6A 5320 bytes
font_01_sfnt_off0000f042.bin
8ce42a84cd5f73c294f1e8453642e83375d6c96da4d0fee9b5d3ada31cf20c2c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF042 10636 bytes
font_02_sfnt_off0001146a.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x1146A 4324 bytes