Malicious PDF — malware analysis report

Static analysis result for SHA-256 6376a8b4a4be48f2…

MALICIOUS

PDF

34.5 KB Created: 2021-06-26 03:25:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 97456b360127275cc01b1de29dd96039 SHA-1: 7b0bcf93a27214868d7b7275de88b31efc9b8146 SHA-256: 6376a8b4a4be48f2fffbe1ab3ab207c0c48f0b378112ffff9de022e4e8d0f5c1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free Robux' or game hacks. The primary lure URL is http://netcdn.co/app/431946152/roblox-free-robux-no-survey-or-download-game-hack. This indicates a phishing or scam attempt designed to redirect users to potentially harmful content or further malicious sites.

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/roblox-free-robux-no-survey-or-download-game-hack In PDF document text
    • http://www.alpaca-buitensport.nl/images/roblox-trade-currency-hack_GM431946152.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/mathep_GM431946152.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/roblox-hack-users_GM431946152.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/how-to-become-headless-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/get-free-robux-no-inspect-fake_GM431946152.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/dashing-simulator-roblox-hack-tutorial_GM431946152.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/free-roblox-groups_GM431946152.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/shadow-raid-cheats-roblox-notoriety_GM431946152.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/hack-the-coin-master_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/earn-robux-com_GM431946152.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/ban-roblox-pour-avoir-hack-des-robux_GM431946152.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/how-to-farm-money-in-boku-no-roblox-hack_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_off00002ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ECB 22280 bytes
SHA-256: bc014e6f16c84b2b4ecc674abf600a188c72ad09a76ce072b70b085cadc4b784
font_01_sfnt_off0000602d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x602D 19592 bytes
SHA-256: ed6769623961246177ec37b5a92af75dc9b43ce1d1931f95c1961ff26160fcfc

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