Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea2d7b857354a71b…

MALICIOUS

PDF

50.8 KB Created: 2021-06-08 22:20:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6a7e092d0082106ef287c0429f278d06 SHA-1: 6ed5d0c067c6f0a8b2a441e6a589d58fd014f257 SHA-256: ea2d7b857354a71b0d2320572f1d59bd9f9ab100176001cedf11ff046222cd8a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The presence of a visual download button and the overall structure suggest a phishing or scam attempt designed to trick users into visiting potentially harmful sites. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9779

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.tw/app/431946152/roblox-shoes-free-game-hack In PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/robux-today_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-spins-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/pokemon-go-free-pokecoins_GM1094591345.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/app-store-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-free-followers-discord_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-hack-version-2021-free-download_GM406889139.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_off00005392.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5392 30252 bytes
SHA-256: a295d0acde519b87b7ab3b67b23c6b415d060bf127d448e15959860ec06612f0
font_01_sfnt_off000097fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97FB 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off0000a4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4A3 18116 bytes
SHA-256: b785cfdd3e5c45ff6fd96e48e83799db6f18ba17522ec74d7347cd181e292f14

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