Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fabdc996e6b5a71…

MALICIOUS

PDF

34.7 KB Created: 2021-07-06 01:13:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 097108f4bb4b0af6e8a4eed9c9260abe SHA-1: 17d9e315cc35c84360fd3242716a6b1c93659ad4 SHA-256: 7fabdc996e6b5a7127a24d0d2351ae7741c7d60cf573c46518b26f20e67e69fe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/406889139/get-free-spins-in-coin-master-game-hack. The document body and embedded URLs suggest a lure related to game hacks and in-game currency, likely to trick users into downloading further malware or visiting malicious sites. No scripts were extracted, but the presence of multiple redirector links and the ML classifier output indicate a high likelihood of malicious intent.

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/406889139/get-free-spins-in-coin-master-game-hack In PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/cheat-engine-roblox-2021-robux_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/cheats-roblox-high-school_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/base-wars-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/como-tener-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/free-roblox-card-pin-code_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/play-free-games-online-without-downloading-roblox_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/roblox-hack-download-free-robux_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/money-hack-western-frontier-roblox_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/how-to-get-server-side-hacking-on-roblox_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/free-skin-roblox-download_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/pubg-uc-egypt_GM1330123889.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/hack-any-roblox-account-program_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/get-robux-for-free-2021_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_off0000324d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x324D 22848 bytes
SHA-256: 9437e44e2dfe53a375ad6499890ce01a93bf744d7ae49ec3b6d27ed8a8b0957a
font_01_sfnt_off00006555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6555 18176 bytes
SHA-256: 40bd2a423e8c3e22f2455c3bf096c64e087039c583c2df40abec99adf6858c95

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