Malicious PDF — malware analysis report

Static analysis result for SHA-256 03fbb9175b8de3cb…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 01:37:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 340d8de8b0330b1322922f3d2ccd3c48 SHA-1: ee0ce7862ba2ea52e5c8fb33dd5ee7c6159e3db9 SHA-256: 03fbb9175b8de3cb8a4f0e8e2261ef55551aff06328d54732c141573b9477be0
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/431946152/roblox-gift-card-for-free-game-hack. This infrastructure is used to lure victims with promises of free game hacks or currency, likely leading to further malicious content or downloads. The document body and heuristics strongly indicate a social engineering tactic to drive traffic to these malicious sites.

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/roblox-gift-card-for-free-game-hack In PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/coin-master-level-3_GM406889139.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/free-roblox-top-battle-games_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/coin-master-free-spins-link-download-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/tiktok-i-feel-kinda-free-song_GM835599320.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/simple-roblox-hack-scrpits-2021-pastebin_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/get-more-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/free-robux-websites-no-human-verification_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_off00002ea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA0 23308 bytes
SHA-256: 432523053ac17a585649da3c434137d31b6eeade59ec517087e9b49118f71b53
font_01_sfnt_off0000631e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x631E 19048 bytes
SHA-256: 36d692819cd4052ea0b92a15cd52fa98a127e8d11e0430d7a0f06642361bda99

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