Malicious PDF — malware analysis report

Static analysis result for SHA-256 575dba8cb5264c0d…

MALICIOUS

PDF

51.3 KB Created: 2021-06-03 05:55:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 70885b45214ecdb41e880489b801581d SHA-1: fc83e5fe242e83112b7a273e8a65bce2be2c89c7 SHA-256: 575dba8cb5264c0d079f125455d43dc0a46fed72c581274e42d573e327b5a52c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to sites offering game hacks and generators, a common lure for phishing or malware distribution. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest a phishing or social engineering attack vector, likely aiming to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9724

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/406889139/free-coin-master-spin-and-coin-link-game-hack PDF link annotation
    • http://perpustakaan-stikesmsb.com/repository/coin-master-free-spins-generator-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/minecraft-for-ps3-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/what-do-roblox-points-do_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/roblox-promo-codes-2021-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/coin-master-lucky-patcher-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/how-to-hack-someones-roblox-account_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_off000054ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54EF 26556 bytes
SHA-256: ba22507f757629047aa88603bc090e5984d3a17c068c83b205d22e150ef5d55a
font_01_sfnt_off000091a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91A8 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_02_sfnt_off0000a633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA633 18228 bytes
SHA-256: 033fb27de386422edfdfffc04f89508c7363de2f22c7244a0850c98a16a8d6aa

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