Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f6c83bb2c7fa83b…

MALICIOUS

PDF

34.6 KB Created: 2021-06-18 03:36:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: d65ec4b8a331e7c78561f3c07f819f72 SHA-1: ad33c22b9c14959450c4495ef37660dfdb631271 SHA-256: 6f6c83bb2c7fa83b376bf417348c6c28b8b1817d440657a791f4eed670091f33
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and generators. The primary URL, http://netcdn.co/app/431946152/cheats-in-roblox-games-game-hack, is identified as a malicious redirector. The document body and embedded URLs suggest a phishing or scam campaign aiming to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/cheats-in-roblox-games-game-hack In PDF document text
    • https://encounternepal.com/userfiles/files/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/tiktok-free-auto-liker_GM835599320.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-free-spins-and-chips_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-games_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/roblox-hack-installer_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-unlimited-robux_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
font_00_sfnt_off00003154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3154 22264 bytes
SHA-256: c2235dd97995f7b31aa9fb911236c04a7693a6faf445ce5e268c2340523df4aa
font_01_sfnt_off000062ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62EA 18828 bytes
SHA-256: 532167b7a1e10a0b50310cd5404b4e5b7584991ea662ae48b38174fb2bddbba2

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