Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d29ffe6dfe4422…

MALICIOUS

PDF

41.1 KB Created: 2021-05-12 15:43:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 848f2b3ab4b503f0c92ce84a1b952556 SHA-1: d422d59e2d05a2b074ef4978e53afaae9891db8f SHA-256: 04d29ffe6dfe4422e68209820d28fa1dc14cbbcc84626b2d6c324121fa8ace3d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document contains multiple links to known malicious redirectors, including one that masquerades as a 'free generator / game hack'. The document body and embedded links suggest a lure to trick users into downloading further malicious content. No scripts were extracted, but the presence of malicious links and the ML classifier output strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/free-old-roblox-accounts-game-hack In PDF document text
    • https://allhimalayantreks.com/userfiles/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-vip-roblox_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-game-hack-apk_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-hack-android-2021_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/robux-free-c_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-can-you-get-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
stream_003_off000046f6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46F6 24120 bytes
SHA-256: a37796e0273305ac25fce8161f48f82b98548580f1d7a281fbc61df4a0556b2f
font_01_sfnt_off00007e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E02 18368 bytes
SHA-256: ba2f6d3da4eaca6d1fdd270dc574262566f59b0810be26bac781a581096b393b

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