Malicious PDF — malware analysis report

Static analysis result for SHA-256 b54d2fdf196988bc…

MALICIOUS

PDF

35.4 KB Created: 2021-06-26 14:26:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: f9bf10e5baf36002622907aff52efcc6 SHA-1: a891d977eaaae835f5a07c487d8891bea17487db SHA-256: b54d2fdf196988bc690315d847119215da924267856eff8c08de405086bd0262
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure for game hacks and free generators, directing users to malicious redirector URLs. The embedded URLs, such as http://netcdn.co/app/431946152/roblox-free-download-on-game-game-hack, are flagged as malicious and part of a known redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious intent to redirect users to potentially harmful content, likely for further exploitation or malware delivery.

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-download-on-game-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/robux-best_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-shirt-creator-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/master-hack-coin_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-promo-codes-september-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/twitter-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-esp-aimbot-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/link-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/unjailbreak-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/what-is-exploiting-in-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/cheat-in-roblox-gold-venture_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-the-zombies-code-roblox-dance-simulator_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hack-no-survey-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/if-you-delete-minecraft-can-you-redownload-it-for-free_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_off0000327a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x327A 22516 bytes
SHA-256: 34a67922079ddcb0dc2f21d45f16937f2e4e913987b5e05f13b7b00da09032d1
font_01_sfnt_off0000645c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x645C 19416 bytes
SHA-256: 26be9ddda8727cd0fb7c917d77ee039b8e1af2bce889adf4789ea38bf577fa73

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