Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b9f6b9d641a9106…

MALICIOUS

PDF

43.5 KB Created: 2021-05-19 09:46:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ba876ff54978441b491da23569f213c2 SHA-1: 60ac5cd599d0169df6df4b5ef243a667bdad996d SHA-256: 7b9f6b9d641a9106dee85883cbdc6d31ffa82113e4b208ace43b051f553a8780
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing for a game hack redirect lure, pointing to a malicious URL. The document body, though obfuscated, contains references to 'Real Robux' and the same malicious URL, reinforcing the lure. The presence of embedded URLs further supports the malicious intent of directing users to potentially harmful content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.xyz/app/431946152/real-robux-game-hack PDF link annotation
    • http://korporacjaroma.pl/images/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • http://korporacjaroma.pl/images/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/pubg-uc-whatsapp-group-link_GM1330123889.pdfIn PDF document text
    • http://korporacjaroma.pl/images/minecraft-win-10-free_GM479516143.pdfIn PDF document text
    • http://korporacjaroma.pl/images/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/coin-master-3rd-village-free-2021-gift-card_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/game-hunters-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/how-to-get-minecraft-for-free-on-mac_GM479516143.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_off00004adf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4ADF 26332 bytes
SHA-256: 8daf77d81b23862191e95acbe0ff911e8a7c4ccbccee2e5c5cb18f05cbcf9009
font_01_sfnt_off000087fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87FC 18152 bytes
SHA-256: 122d2ae9912be3fd3cd6fd29e560213cf54dafc8cf3a40d46cc77b1cbc878b6c

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