Malicious PDF — malware analysis report

Static analysis result for SHA-256 91553d4b27351667…

MALICIOUS

PDF

82.7 KB Created: 2021-02-01 12:46:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e674a8873433f78aec36cfb4c521ec71 SHA-1: 9fb7aaad53b91241cde02e3b1123002294033dd8 SHA-256: 91553d4b273516679d60a7f1bf069d64d209aee24c31ea17ed5b31f56dd08c35
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site for further exploitation. The document body, though heavily obfuscated, suggests a lure related to a product advertisement.

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://maypoin.ru/123?utm_term=razor+blade+sharpener+as+seen+on+tv PDF link annotation
    • https://cdn.sqhk.co/dutebevon/HickBKA/hero_dash_diecast_spinoff_mini_game_list.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/tinavatudubvcqq.pdfIn PDF document text
    • http://shtancircul.site/seven_code_coffee_gading_serponglyvag.pdfIn PDF document text
    • http://naturka.space/dragon_ball_z_torrentyf8axm.pdfIn PDF document text
    • http://malespw.xyz/adobe_after_effects_cs6_32_bit0j1i9.pdfIn PDF document text
    • http://firstreadersclub.com/cardboard_bus_cat_house_diys1fd2.pdfIn PDF document text
    • http://small-italy.space/african_proverbs_quoteschvwg.pdfIn PDF document text
    • http://baltika-trans.com/393300189477oojh.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/pjgykjf/cold_war_black_ops_zombies_maps.pdfIn PDF document text
    • http://br1.red/zodixavewezuxuguxivirusu6v6gj.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/mubefula/83383155423.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/29743171047.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/tulesutalitabav.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/hiragana_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/espn_fantasy_football_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/microsoft_games_spider_solitaire_windows_7.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_off00010690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10690 5304 bytes
SHA-256: 28aac3adad4f243a5bae0587064908817b308622933f80e355836fdfba432750
font_01_sfnt_off0001189b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189B 10864 bytes
SHA-256: 0aebf5cb6e4e149566726d66403dd957c1c1f5014df7ad9bca73acbab94ba0a4

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