Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e88725ff5577fbc…

MALICIOUS

PDF

48.9 KB Created: 2021-06-03 23:16:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7e846493690b09f98031365aa0f97630 SHA-1: 2f6a33081d916bc9ac8ea879ef1128e6930a9acb SHA-256: 3e88725ff5577fbc20ae1047bb01454b2ab700e1c85814084f1e1a81e4622e83
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically advertising free game hacks and currency generators. The primary malicious link identified is 'https://netcdn.online/app/431946152/free-robux-codes-game-hack'. The document's structure and embedded links strongly suggest a social engineering lure designed to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/free-robux-codes-game-hack In PDF document text
    • http://perpus.i2s-learning.com/repository/robux-game_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-hack-progamers_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-free-spin-best-link_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-game-free-download_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/wahoogaming-co-free-robux_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_off000050d0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50D0 27912 bytes
SHA-256: 4955f3952246c43f98219277dcd8b51f12c851dca3b36bce5307dab1c1007f94
font_01_sfnt_off00008f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F80 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C91 18188 bytes
SHA-256: 7763b0eba74f003993d6ddc379ef756dfeeff7cedd1b34d70c41f8674d393ab3