Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea28d1a88407e199…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 15:04:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 69ee3e9c8a61072eef8b254a72eae429 SHA-1: 275300fd86c968a3f848fc902deff499fed50814 SHA-256: ea28d1a88407e199d435ed93389527132db14f05b820522773a0ac400791b5ad
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, designed to lure users into clicking on game hack or generator content. The primary malicious link, http://netcdn.tw/app/431946152/how-to-hack-roblox-on-macbook-pro-game-hack, is associated with known malicious infrastructure. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/how-to-hack-roblox-on-macbook-pro-game-hack In PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/comment-hacker-pour-avoir-des-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-i-get-free-robux-meme_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-bighead-hack_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/robux-money-cheat_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/juego-de-roblox-hecho-por-un-hacker_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/download-roblox-for-free-online_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-hack-into-peoples-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/download-coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/i-want-to-break-free-roblox-versin_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/7-year-old-roblox_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
font_00_sfnt_off00003241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3241 22608 bytes
SHA-256: 5e8ac76a7f84da482ec1fc2f48e1a00a63c66572971b49dcecfae293de05e2b1
font_01_sfnt_off000064d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D3 19168 bytes
SHA-256: fafb61731e2b30e7e0af02a7d0c1bc39acd07e768301ef3952ff66e87812f901

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