Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc90c196be8eff25…

MALICIOUS

PDF

35.2 KB Created: 2021-06-20 04:53:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: fa8e77c40537e9391fa27580405e1a2d SHA-1: 9c7b8ee5128477a33f35a1f62d31700184525377 SHA-256: cc90c196be8eff253e3adeed515144a95e9f00ac475b2a13c6d13ef79db3c447
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to websites offering game hacks and free in-game currency, such as Robux. One of the primary links, http://netcdn.co/app/431946152/how-to-hack-a-roblox-user-account-2021-game-hack, is identified as a malicious redirector. The document's content and embedded URLs strongly suggest a phishing or scam campaign designed to trick users into visiting malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/how-to-hack-a-roblox-user-account-2021-game-hack In PDF document text
    • https://fordogtrainers.mx:443/images/what-is-coin-master-app_GM406889139.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/minecraft-free-install_GM479516143.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/how-to-get-free-robux-on-roblox-2021-not-clickbait_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/roblox-hack-tool-robux-and-tix_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/roblox-robux-cheaten_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/free-robux-ad_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/trucos-para-free-vip-ultimatesurvival-rpg-roblox_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/roblox-two-player-military-simulator-tycoon-money-hack_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/elysium-bros-free-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_off000030d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D6 22516 bytes
SHA-256: dc86071cee5fad11221c86baa983d81a3ee82bf9325c022f6f0e22dceb7d65dd
font_01_sfnt_off00006301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6301 19468 bytes
SHA-256: 69629715e923f2403cebbfedc09d2fc78518ad74acc161499e2018d0df4bb0f4

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