Malicious PDF — malware analysis report

Static analysis result for SHA-256 54705753ceda46c2…

MALICIOUS

PDF

48.9 KB Created: 2021-06-03 05:44:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a20c186bac66f7ce24e78346a3dafc4e SHA-1: fa03a206203006095e16730bcdabc7b9cde67ddc SHA-256: 54705753ceda46c23f0476a6452cf3a00e83db5e861918677007ff5dc25f2856
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-confidence heuristic firing for a 'GAME_HACK_REDIRECT_LURE' pointing to a URL promising free Robux. The document body, though partially corrupted, also contains similar URLs and text related to game hacks. This suggests the primary purpose is to trick users into visiting malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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-to-get-free-robux-without-verifying-game-hack PDF link annotation
    • http://katalog.gemalibrary.net/repository/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/best-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-new-link-free-spin_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-online-hack-generator_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-800-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-font-free_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/mangocheats-com-hack-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/2021-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-robux-generator-2021_GM431946152.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_004_off00005100.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5100 27392 bytes
SHA-256: 7227d89a6e601d11e074ea1c91d661ef51fb9694b9fc0dedba03120f45bc966e
font_01_sfnt_off00008f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F63 2852 bytes
SHA-256: 6c344bff8cb11efcfa323542d02369dac514041cc19c9a49b1052cb126dcbdcf
font_02_sfnt_off00009924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9924 19368 bytes
SHA-256: 63de63cfc252acdf530e8b3b2390dbc20d855d9653817057ed506b48c41b68ab

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