Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ca65f15e9881d71…

MALICIOUS

PDF

36.8 KB Created: 2021-06-19 13:08:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 33be0319f24a67e88dff5024c4404fc3 SHA-1: 2cf0e0bcefb960ecc6de8bab8b6b1448a7b140f4 SHA-256: 5ca65f15e9881d71f6772741b9380da1604937943d113bfd0b82f168ad180cb4
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as "free generators" or "game hacks" for popular games. The document body and embedded links suggest a phishing or scam attempt to lure users to malicious websites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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) or Microsoft license-boilerplate 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 http://netcdn.co/app/431946152/roblox-free-cookies-game-hack In PDF document text
    • http://kermas.eu/images/roblox-free-hats-catalog_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/coin-master-free-pet-food-links_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • http://kermas.eu/images/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://kermas.eu/images/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/how-to-wall-hack-in-roblox-murder-mystery-2_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://kermas.eu/images/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • http://kermas.eu/images/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/best-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/coin-master-free-2021_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/robux-free-online_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/master-coin-free_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A51 22416 bytes
SHA-256: d053208d2f4bbe5f8a8016d5fc0e6ebc20bdf85c4cf44255f983022ad68fb0ce
font_01_sfnt_off00006c24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C24 18752 bytes
SHA-256: 5ca0cd26a17f4cdb1cf0e4519769d2be0a1061f239b92f39173facf811c1d76a

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