Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca4c18b5e1dcb60a…

MALICIOUS

PDF

32.5 KB Created: 2021-07-05 10:00:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5b07038d0609c3e66456722fed33eb2d SHA-1: 053e659bb6770d0caa8cdd8f3d466d6d0c6e275f SHA-256: ca4c18b5e1dcb60ac0a638d4fe2f2b7e2a914261c39d4fc2f7897ac08c679f6e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/479516143/minecraft-games-free-to-play-online-game-hack. The document body and heuristics suggest a lure for game hacks or generators, likely intended to lead users to download further malware or engage in phishing. No scripts were extracted, but the presence of embedded URLs and the redirector link strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/479516143/minecraft-games-free-to-play-online-game-hack In PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/redeem-code-redeemer-to-get-free-800-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-cheat-source-leaked_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-hack-generator-club-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/el-mejor-hack-de-roblox-del-mundio_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-group-payouts-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-free-buff-body_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-hack-injector-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/get-free-robux-without-doing-anything_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_off00002bb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BB4 21760 bytes
SHA-256: 3965d8a92b09a0110dadccba0f359e29facc1e4b9cfc17452f6684505eb32c55
font_01_sfnt_off00005b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B91 18664 bytes
SHA-256: c1445901f71b4061cf95e5208f0f2c27ed76d2f6a65b22d2003e7abc4ada30b9

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