Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a9a2e10dbed2cfa…

MALICIOUS

PDF

45.0 KB Created: 2021-06-09 15:05:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 312145b8fc4d566273f78fbd11dba276 SHA-1: a9ac8fdaee2f57f677e18dcf6310515228a2a170 SHA-256: 6a9a2e10dbed2cfacc722b378b45fc2fb7f6539feb9fa76df5db8c2bea5cfd6e
82 Risk Score

Malware Insights

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

The PDF document contains multiple links to external websites that are advertised as game hacks or cheats for popular games like Roblox. The ML classifier and heuristics strongly indicate malicious intent, likely to redirect users to sites that host malware or engage in phishing. No scripts were extracted, but the embedded links serve as the primary vector for potential compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/cheat-tool-roblox-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/wurst-hacks_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-hack-any-account-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-hack-and-get-a-free-item-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/pokemon-go-free-85_GM1094591345.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_004_off00004e8f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E8F 28304 bytes
SHA-256: 778477f62fd33794f6c0a5b872e5f2562450339a061aefa851f785db2f2887f0
font_01_sfnt_off00008d6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D6F 18280 bytes
SHA-256: 1e2671db95eb9a9c8005891c1e2e3d737d4242f58ab288a305c89a7197cc6ca0

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