Malicious PDF — malware analysis report

Static analysis result for SHA-256 48dc6b1c0820058d…

MALICIOUS

PDF

35.2 KB Created: 2021-06-20 06:46:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 8a08a065635157f2b9ac072cac26ea1f SHA-1: c4c5e2eac293fb0e23acf7651f769ccac3c347cd SHA-256: 48dc6b1c0820058dc532510f0120812bdfdad9850ad66da594e3893b30703021
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically targeting users interested in game hacks and generators for platforms like Roblox and Coin Master. The primary malicious URL identified is http://netcdn.co/app/431946152/pastebin-roblox-accounts-hack-game-hack, which is associated with known malicious redirectors. The document body and heuristics indicate a lure-based attack aiming to redirect users to potentially harmful content.

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/pastebin-roblox-accounts-hack-game-hack In PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-spins-coin-master-links-no-human-verification_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-kick-me-whon-i-cheat_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-mobile-360-info-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/moonactive-free-spins-link_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-roblox-passwords-with-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/noclip-hack-roblox-jailbreak-may2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-manquin-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-hack-pc_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/minecraft-pe-free-ios_GM479516143.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_off00003169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3169 22704 bytes
SHA-256: 1ec0203d75c52d713f8e6d31bde95f19d44ea4d5929df1c91522b801a2efbfa1
font_01_sfnt_off0000640f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x640F 19176 bytes
SHA-256: a091ae8059987ec4ddc53218ee2639d06844d2cdd33068f06cb4901681941439

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