Malicious PDF — malware analysis report

Static analysis result for SHA-256 2514af273a4469ff…

MALICIOUS

PDF

33.4 KB Created: 2021-07-07 13:20:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 6dfb6600e2de5d42687e3815a4a61e01 SHA-1: d7586a37570f0894674b604d6830df8e50e58de2 SHA-256: 2514af273a4469ffbf3d2e3d56b3724a6e347fd5dd6a48f71508c2aa5d3f47c1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary redirector URL is http://netcdn.tw/app/431946152/free-robux-obby-game-hack. This indicates a phishing or scam attempt designed to trick users into visiting potentially harmful sites. No scripts were extracted, but the embedded URLs and heuristic firings strongly suggest a social engineering attack.

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.tw/app/431946152/free-robux-obby-game-hack In PDF document text
    • http://digilib.unbari.ac.id/repository/how-can-roblox-account-get-hacked_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-find-out-roblox-speed-code-for-speed-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-coins_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-hack-roblox-account-2021-new-method_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/compte-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-be_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/where-to-get-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/pokemon-go-free-daily-box_GM1094591345.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-hack-2021-iphone_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-bubble-gum-simulator-hack-script_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/everythings-free-roblox-mm2-uncopylocked_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-stuff-on-roblox-webste_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-level-7-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_off00002daa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DAA 21908 bytes
SHA-256: 36f67e7bac5f0ede856342e5380c04afc8b5cdd4e692c8528a2a0eb95f6215ea
font_01_sfnt_off00005df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF3 18896 bytes
SHA-256: 6e9f00f662c7d21a362c6f4977b25baee64ea5d1b6302ee915ad89b263504de8

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