Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb54bddcc4ec10f0…

MALICIOUS

PDF

47.9 KB Created: 2021-06-11 04:51:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 12ea2818c2ea1e2be9073d4567445638 SHA-1: 56470ed12f93b1322819529f1126f7862ff25c45 SHA-256: cb54bddcc4ec10f05a44f896d4dd4276d879fc4f4afff2314d8d9843f93f2214
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure related to game hacking, directing users to a malicious redirector URL. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or further stages of an attack. No scripts were extracted, but the document's structure and embedded links strongly suggest it's part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://netcdn.tw/app/431946152/como-hackear-roblox-con-cheat-engine-2021-game-hack In PDF document text
    • http://heilzentrum-ulm.de/images/roblox-cheat-money-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-games-where-you-can-get-free-stuff_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/como-hackear-roblox-sin-descargar-nada_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-hacking-script-hub_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-free-knives_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/can-we-hack-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-get-free-robux-2021-link_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-robux-videos-for-robux_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-18_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/everything-free-in-roblox-catalog_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-fly-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/pubg-74-uc_GM1330123889.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-cheat-worthiness-crab_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-roblox-code-generator-no-download_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/coin-master-online-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54D4 28768 bytes
SHA-256: 6b5ff6a6eacd80084cdd6e6832ba1ff74ed7d7954388c81cababc39db31d348e
font_01_sfnt_off00009524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9524 19524 bytes
SHA-256: 49820c8cb4bccad81aa2f66e50b73af804019f1af0da4fd6cd306c6ac83cb31a