Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d44b19379c87c5a…

MALICIOUS

PDF

47.8 KB Created: 2021-06-03 05:26:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 177a7c0316f0e2a3f10d49d3dafda8d8 SHA-1: 31710b30483e7a04330e4da6665f7a88dbe40e2f SHA-256: 8d44b19379c87c5ade14ebf4814972cb660651aa9048868291c3cf36f7879b3a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to obtaining free Robux, a popular in-game currency, directing users to external URLs. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the presence of multiple URLs associated with game hacks strongly suggest a social engineering tactic. While no scripts were explicitly extracted, the document's structure and embedded URLs indicate it's designed to lead the user to a malicious site or download a payload, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.online/app/431946152/how-can-you-get-free-robux-game-hack PDF link annotation
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/giftrobux-com-generator_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/mcpe-master-hack-unlimited-coins-apk_GM406889139.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/totally-free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/free-robux-meme_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/roblox-people-girl_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/coin-master-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/aimbot-download-roblox_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/free-spin-coin-master-2021-link_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
stream_004_off000052f6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52F6 30088 bytes
SHA-256: e957fd73a2ba55fa82d69b14c4035202eb0209d5d5bf7a281d3ca035fae76bf8
font_01_sfnt_off00009729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9729 18672 bytes
SHA-256: b25769fe22a84510cbe545ecc77c61068e90e31ebb29fb78564d629eaf3a10b0

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