Malicious PDF — malware analysis report

Static analysis result for SHA-256 b368ae1bca49328b…

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 22:29:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 1c9403d9341e7d33b86e06192a725009 SHA-1: c1a5a293d6bb9167bb2b0e6b70f39862fc539fc4 SHA-256: b368ae1bca49328bf9e8133161495171cc8fd092d027e7c04cba8e445cb475f9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure related to free game hacks and generators, as indicated by the 'PDF_GAME_HACK_REDIRECT_LURE' heuristic. It links to a known malicious redirector infrastructure, confirmed by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier also flagged the document as malicious. While no scripts were explicitly extracted, the document body contains a URL that is likely the primary payload delivery mechanism.

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.online/app/479516143/is-minecraft-free-on-nintendo-switch-game-hack In PDF document text
    • http://perpus.stihpada.ac.id/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/minecraft-free-school_GM479516143.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/minecraft-free-download-mobile_GM479516143.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/how-to-get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/how-to-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/coin-master-hack-using-cheat-engine_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_004_off0000529e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x529E 24436 bytes
SHA-256: 3fd117f54e98329bc65f2462f49a1544dfddc5261dcbb1425122bac2825704f9
font_01_sfnt_off00008a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A22 18212 bytes
SHA-256: 88833f0f37aaf816a00c97530fc90e87f2df28a22611e5c00792867ae98cdb6c

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