Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5a55cb2913e500b…

MALICIOUS

PDF

34.1 KB Created: 2021-07-01 22:17:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ce74245ccc82eb874f26ee23d48ad079 SHA-1: 9478d639a87d8e9c1ac29dbb226aeafdedafc877 SHA-256: a5a55cb2913e500b1277541eea46c009306910f7b5f0fc93454b322838165130
82 Risk Score

Malware Insights

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

The PDF document contains a lure for game hacks and free in-game currency, directing users to a malicious URL. The ML classifier strongly flagged this PDF as malicious, and the embedded URL is associated with a game hack lure. No scripts were extracted, but the document's structure and embedded links suggest it is designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/everything-for-free-in-roblox-game-hack PDF link annotation
    • https://goodtools.tw/upload/files/free-robux-card-redeems_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/all-roblox-free-items_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-pastebin-2021_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-offers-for-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/hack-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-hacks-case-clicker_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/schoto-roblox-free-shop-hair_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-hacker-beta-download_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/como-hackear-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-robux-very-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F33 21952 bytes
SHA-256: 0529da94a39b1b538304475f3b10ad081444304046509bbc3b1edefee1204349
font_01_sfnt_off00005f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F98 19332 bytes
SHA-256: 2825aa106951181093e71cf63d70670843cfd581ecaa202026a63db90e0d2d91

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