Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cf6de5ab036c72b…

MALICIOUS

PDF

43.6 KB Created: 2021-05-16 08:12:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e97f68efe3be227dc60a5c617e2d8ab3 SHA-1: 044ba61e69f0b8a9dfe0c13587c62951eeab2ffd SHA-256: 8cf6de5ab036c72b12380764492787cb93ebf1d75de9686145fe5f0f9ffd5765
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as 'game hacks' and 'free spins'. The document body and embedded links strongly suggest a lure for users seeking cheats for games like Coin Master or Roblox. The primary attack pattern involves redirecting users to potentially malicious websites for further exploitation or phishing.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/406889139/coin-master-free-spins-deutsch-download-2021-link-game-hack In PDF document text
    • https://www.xenonsvjetla.com/files/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/coin-master-free-coins-amp_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/how-to-earn-robux-fast_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://xenonsvjetla.com/files/freecoins_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://xenonsvjetla.com/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/how-many-levels-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/how-to-get-free-robux-generator_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_off00004cb8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CB8 25000 bytes
SHA-256: 435cff238af7ec25f1e8915d4433138024a0e9f3ca3e6be29955b645d0e8b207
font_01_sfnt_off000084f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84F5 19344 bytes
SHA-256: 2845a3e6ec075e64a55efc9536af757c9c9ea9b8a2b732129eaf0438470dc816

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