Malicious PDF — malware analysis report

Static analysis result for SHA-256 d137abc073a8c427…

MALICIOUS

PDF

44.5 KB Created: 2021-06-07 05:17:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7b03715f1e88b8c47ccd771efe9aa48e SHA-1: 0f9f415f468ee86780b1a8d6e361783107448948 SHA-256: d137abc073a8c4279b6cf66dcfd5f8e304a1f3e0151d76d9e310cb26f22c186c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links, specifically targeting users with lures for game hacks and generators. The primary malicious URL identified is https://netcdn.tw/app/431946152/hacks-for-roblox-prison-life-game-hack, which is linked from the document body. The document's structure and embedded content strongly suggest an attempt to trick users into navigating to potentially harmful websites, likely for further malware delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/hacks-for-roblox-prison-life-game-hack In PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/minecraft-114-download_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/robux-boost_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-add-mods-to-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-vip-gamepass-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-without-human-verification-real_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_004_off000050ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50EF 25380 bytes
SHA-256: 84af2b67e3f3e1e6729b08925599d1f4a72238c872dbf86e0bf80a20cd39bbdc
font_01_sfnt_off00008aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA2 18620 bytes
SHA-256: e3f2ecfa212854396a9435be993bd19ffc5a7ead26ebe64f65252827dfac6040

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