Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aa417616f394337…

MALICIOUS

PDF

36.5 KB Created: 2021-07-06 07:51:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 115e9c7d1d78a035669234ecbf7fbefc SHA-1: 3d3898208526c0e15fdda0b3f6f1b09a8f887148 SHA-256: 3aa417616f3943375effd9ed9058f80f741dea8979ef91e3565e592cde388b4e
82 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with a primary focus on luring users with game hack promises. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates a malicious intent to redirect users to potentially harmful sites. While no scripts were directly extracted, the nature of the lures and the numerous external links suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

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.tw/app/406889139/haktuts-coin-master-free-spin-today-game-hack PDF link annotation
    • http://katalog.ireyogya.org/repository/roblox-free-robux-codes-2021-wiki_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-free-robux-in-one-second_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/master-game_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-shirts-roblox-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/wwwcoin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-genorators_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-free-animations-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-put-a-roblox-hack-in_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/hack-proxo-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/minecraft-windows-10-key-free_GM479516143.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_002_off00003521.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3521 23624 bytes
SHA-256: c5c6a7cc129cc597971abbc1779815b796b0c06998e662e9a2b9ac8d80d5ba07
font_01_sfnt_off00006a94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A94 18840 bytes
SHA-256: 972c50e57b5d8bef4e8a1a4d64318d2c4a5eeb25991c57ca0d9be4dff359939e

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