Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4afea6b0305b75f…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 10:15:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 99e3cecb5946f8804ef7ace5060e9095 SHA-1: 7d6275023000e5b2611bf709292113192772366b SHA-256: d4afea6b0305b75fe823bf1ae443bfae03f0c16d8d7bab5345d08ffc09a318c6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and free currency, directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to redirect users to malicious content, likely for malware distribution or credential harvesting.

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/hack-coin-master-apk-ios-game-hack PDF link annotation
    • http://perpustakaan.stikeshamzar.ac.id/repository/how-to-get-free-robux-no-apps-needed_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/how-to-use-cheat-engine-67-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/free-robux-april-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/wurst_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/how-to-get-free-robux-safely_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/case-clicker-hacked-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/get-roebucks-com_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/how-to-hack-robux-using-inspect-element-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/coinmaster-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/roblox-exploit-for-free-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/roblox-underfighters-2-cheat-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/roblox-cheats-for-money-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/logiciel-hack-roblox-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/how-to-get-free-robux-no-survey_GM431946152.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_off00002f6d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F6D 22680 bytes
SHA-256: 9316527bee55898110fa53e1cce652798906c8cbbfd33b3b1b5e3926c277e23e
font_01_sfnt_off00006237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6237 18180 bytes
SHA-256: 92885cdb40844dabedcd789cc0fdc1dae3095a00aebbb69c69b4668ac08d7e62

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