Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e0b02c2e53f6523…

MALICIOUS

PDF

48.4 KB Created: 2021-05-12 01:06:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8aa991210f3ceff56847774f982e15af SHA-1: f5c08270d39834fce86a02f6f56987a393475925 SHA-256: 9e0b02c2e53f65238fa2a23971d0be805c35f7ae1e8e41c6c1442e6e6c043d7e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one that redirects to a known malicious infrastructure. The document body and heuristics indicate a lure for free Robux, likely to trick users into visiting a malicious site. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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.xyz/app/431946152/roblox-games-that-give-you-free-robux-game-hack In PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/minecraft-free-minecraft_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-link-daily_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-free-no-download_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_003_off00004b03.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B03 27760 bytes
SHA-256: b925010e140e617214550899c4503b38450ea9a37473081eed143814b96e322d
font_01_sfnt_off00008b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B8C 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9833 19240 bytes
SHA-256: af18d9cb6acc741702b59c78a5d378fdddaa2c6ad6fac2421576a1d1ac5dc213

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