Malicious PDF — malware analysis report

Static analysis result for SHA-256 169eab3031c6c5fe…

MALICIOUS

PDF

45.8 KB Created: 2021-05-11 19:30:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: fbdeb6ceea8e2a79806113d6fede2c20 SHA-1: 8903091759eade8636a0ba7bfc839f63771706d9 SHA-256: 169eab3031c6c5fe02c849b94b05a4e53eb6508b667d0918e1f150ced7699ce8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'free Robux' and 'game hacks', directing users to a suspicious URL. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to a malicious site, likely for phishing or malware distribution. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/free-800-robux-game-hack PDF link annotation
    • http://katalog.gemalibrary.net/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-spins-and-coins-com_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-girl_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-com-games-referrer-roblox-player_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/what-do-points-do-in-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/make-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004820.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4820 26752 bytes
SHA-256: 2d02e6cfd4fd4a91c2513a1b6034f0db0bd7d59d31e0593f499dacfc6fb937ca
font_01_sfnt_off00008662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8662 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00009012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9012 18396 bytes
SHA-256: 2059a7894931e9b75336f5975f03d939213f3fdb926ff7d6db67df9fd1731cb7

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