Malicious PDF — malware analysis report

Static analysis result for SHA-256 0189317c493b2400…

MALICIOUS

PDF

33.9 KB Created: 2021-07-05 21:37:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 7934a47322e934177a09d964a1e5b50f SHA-1: 03f89e6f2cdc4a95720c04cdc17e15c4344b7ab1 SHA-256: 0189317c493b24009ba72e98a146b809b1dce04ae6525825892f8e40852e8c63
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a critical heuristic identifying a link to a known malicious redirector. The document body and heuristics suggest a lure for game hacks, specifically 'Coin Master', which redirects to a suspicious domain. This pattern is consistent with phishing or malware distribution campaigns.

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/coin-master-latest-version-hack-game-hack In PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/book-wings-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/rbx-earn_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/fast-robux-online_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/gravity-coil-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/how-to-make-robux_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/free-draw-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/pubg-uc-and-rp_GM1330123889.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/coding-script-for-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/pubg-90-uc_GM1330123889.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/free-spins-and-coins-from-coin-master-game_GM406889139.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_002_off00002e89.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E89 22960 bytes
SHA-256: b132ab2358bfb6a042049dcb579c4d29ff31771077717b2d11851318f4496888
font_01_sfnt_off00006231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6231 18140 bytes
SHA-256: a9e8470a6ff9ffe956151425c7fda0f1cece6269167d4df22c16351a2ed4f3ca

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