Malicious PDF — malware analysis report

Static analysis result for SHA-256 38ca9d53d4a30e05…

MALICIOUS

PDF

47.5 KB Created: 2021-06-11 04:25:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3025b9a6d21f4bcd28a4e3a1a848d69b SHA-1: 5a9b10497a0b83156c363f1bd73f5ab2a615f248 SHA-256: 38ca9d53d4a30e056ad723495603757c396f27728233a05eefaeb490a0703887
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/how-to-get-wall-hacks-on-roblox-game-hack PDF link annotation
    • https://limebug.com/media/storage/editor/files/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-xbox-360-free_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/fake-robux-codes_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-live_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/robux-free-c_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-hack-online-cheat_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/robux-offers-free_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-co_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-download_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-hack-roblox-to-get-free-robux_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fbf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FBF 25464 bytes
SHA-256: 2df362bc510631d6d8eaec238ff8495c82671f0d530209020b2b7800c4abb30d
font_01_sfnt_off00008b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B41 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00009551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9551 18648 bytes
SHA-256: 51a44c10f01a960d79c55eb3bb0c52cb75ce8b125753fe75d77330178a2ce31d

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