Malicious PDF — malware analysis report

Static analysis result for SHA-256 4300983a1ca3b104…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 17:52:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 028f6a629991bcdc3ca3a8b8d7d8f495 SHA-1: a830a8307ba9cf375942dc56980f9dc4abd5fd21 SHA-256: 4300983a1ca3b104985120648e8ed1877ebcdb7afab37daa81f65d3c325b6e08
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, that promise free game currency and hacks. The document body and extracted URLs suggest a lure for users seeking in-game advantages, likely leading to credential harvesting or malware download. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate a phishing or redirection attack.

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-free-coins-twitter-game-hack In PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-download-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-fly-script-hack_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/work-at-pizza-place-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-hack-spins-app_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/when-will-welcome-to-bloxburg-be-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-hack-into-your-friends-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-jailbreak-hacker-transparent_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/hack-roblox-jailbreak-2021-new_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-transformer-roblox-costumes_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/chesskoo-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/blox-best-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-hack-speed-in-dash-simulator-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-free-blue-hair_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-use-a-hack-script-in-roblox_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
stream_002_off00002e84.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E84 22928 bytes
SHA-256: 193ba54007346a1c0dedd7a34eb8b4d68e0a1f0d4d0efa969dce45bab4544578
font_01_sfnt_off000061df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DF 18164 bytes
SHA-256: 09e900af93239ebf083e1853a07df87e0e3ca0331bfdd202e2e38c424b6e948b

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