Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1a1ec31d447f949…

MALICIOUS

PDF

43.7 KB Created: 2021-05-16 15:44:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: fafb050e53b43601edccf7c3d8974664 SHA-1: 7cc34c0c8e798916a3eae1663cf2821e8b9cca4d SHA-256: c1a1ec31d447f9498daa16d3de96cd548cb9665f5c7398d869bd0a8070b405e3
200 Risk Score

Malware Insights

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

The PDF document employs a lure related to game hacks and free generators, specifically mentioning Minecraft Dungeons, to trick users into clicking malicious links. It presents a fake CAPTCHA or human verification prompt to further coerce user interaction. The primary malicious link identified is https://netcdn.xyz/app/479516143/how-to-get-minecraft-dungeons-for-free-game-hack, which is associated with known malicious redirector infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/479516143/how-to-get-minecraft-dungeons-for-free-game-hack In PDF document text
    • http://enosiderma.gr/images/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/free-roblox-girl-hair-not-a-model_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • http://enosiderma.gr/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/roblox-heroes-online_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://enosiderma.gr/images/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • http://enosiderma.gr/images/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • http://enosiderma.gr/images/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://enosiderma.gr/images/woman-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
stream_003_off00004c7a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C7A 26700 bytes
SHA-256: ccb134134963200f9bce31cb3560fbb7b67b0d5aca7a39e9039816d29f4f6611
font_01_sfnt_off00008801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8801 18472 bytes
SHA-256: 65ee82f26cafa7906902f4dbf8f4098f0781a130d3f16ad2d63d9ccc83542dd0

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