Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f424eee807d29bd…

MALICIOUS

PDF

49.3 KB Created: 2021-06-03 22:16:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b577b27e1b339f59417c662739db93c1 SHA-1: 010109c282f7d411a453fda90e3616f988253c47 SHA-256: 0f424eee807d29bd76fafda7b770cb00e1254df7749692c880661398b0c90c78
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and links to external URLs, indicating a phishing or scam attempt. The ML classifier also 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 the user to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/431946152/free-robux-no-human-verification-or-survey-or-download-game-hack PDF link annotation
    • https://digilib.stikesindramayu.ac.id/repository/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-spins-and-coins-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/minecraft-ps3-free-download_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-level-4_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-free-spins-through-coin-pop_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/twitter-coin-master-free-spins_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_off000052b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52B1 26008 bytes
SHA-256: e5ec6d4fde2fe12becc17ba76d5056eb830add00293035d0187316ea7a4fc319
font_01_sfnt_off00008ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF3 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off000099a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99A5 19736 bytes
SHA-256: 59e4374f8172b973ba9217c83b5ce6b26483f5ae1ceeffd331798f57e1658bad

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