Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba7bc789cf719b21…

MALICIOUS

PDF

42.6 KB Created: 2021-06-09 08:01:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5158d3204e85fdb3cf951379573cddad SHA-1: 034a1d2c0324292eb83cf405124985191fe6e515 SHA-256: ba7bc789cf719b213d463b423c288399c51ec78a010a67ff09bc705ddf60b1fd
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lure users with promises of game hacks and free items for popular games like Roblox and Coin Master. The primary URL, https://netcdn.tw/app/431946152/roblox-games-free-items-game-hack, is flagged as a high-risk redirector. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to drive users to malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.tw/app/431946152/roblox-games-free-items-game-hack PDF link annotation
    • http://meisterhaus-guterl.de/images/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/roblox-hack_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/2021-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/earnrobux_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/free-robux-obby-july-2021_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/coin-monster_GM406889139.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/roblox-terminal-railways-free-trains_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/hacks-in-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://192.168.0.99/%20%3Cp%3E%3Cp%3Ehow%20to%20get%20free%20headphones%20roblox%3Cp%3E%3Cp%3Efree%20roblox%20robbux%3Cp%3E%3Cp%3Eroblox%20vip%20gamepass%20free%20script%3Cp%3E%3Cp%3ERedeem%20Roblox%20Promotions.%20How%20do%20I%20get%20a%20Roblox%20promotional%20code?%20You%20may%20receive%20a%20Roblox%20promo%20code%20from%20one%20of%20our%20many%20events%20or%20giveaways.%20Valid%20codes%20will%20earn%20you%20a%20virtual%20good%20that%20will%20be%20added%20to%20your%20Roblox%20account.%20How%20do%20I%20use%20my%20promotional%20code?%3Cp%3E%3Cp%3EDo%20you%20need%20free%20Roblox%20promo%20codes?%20We%20will%20give%20all%20of%20you%20the%20valid%20Robux%20Codes%20in%20the%20best%20sites%20where%20you%20can%20earn%20real%20and%20free%20Robux.%20Why%20Free%20Robux%20Codes?%20Robux%20is%20the%20main%20general%20cash%20in%20Roblox.%20Presented%20on%20May%2014,%202007,%20to%20supplant%20the%20past%20ROBLOX%20Robux,%20focuses%20are%20one...%3Cp%3E%3Cp%3Ehow%20to%20use%20roblox%20scripts%20to%20hack%3Cp%3E%3Cp%3Ethey%20hacked%20my%20roblox%20account%3Cp%3E%3Cp%3Erobux%20hack%20no%20downloading%20games%3Cp%3E%3Cp%3Eroblox%20cheats%20for%20laptop%3Cp%3E%3Cp%3EDonating%20Robux%20PC%20to%20Mobile%20is%20considered%20an%20expensive%20method%20because%20it%20requires%20creating%20a%20group%20that%20alone%20costs%20100%20Robux.%20If%20you%20already%20have%20created%20a%20Group%20then%20this%20will%20be%20the%20best%20&%20quick%20method.%20Now,%20let%20me%20show%20you%20the%20steps%20for%20donating%20Robux%20on%20Roblox.%20Steps%20to%20Give%20People%20Robux%20From%20PC%20to%20PC%3Cp%3E%3Cp%3Eroblox%20meep%20city%20plus%20hack%3Cp%3E%3Cp%3E%5B-%5D%20Z036%200%20points1%20point2%20points%202%20months%20ago%20In 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_off0000508f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x508F 23348 bytes
SHA-256: 7f0adea843b88d0703273133783b8dc66f23f8332ee6f1e97669a09bbb7d34a0
font_01_sfnt_off0000854c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x854C 17964 bytes
SHA-256: a19ec4579ca9584155925e819bccf128499d266d7e38a628dd11ac13636978b1