Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb7d0ca888b8be57…

MALICIOUS

PDF

41.4 KB Created: 2021-05-17 07:58:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 845cf2723ad680e1e2342d7b19bb3cc7 SHA-1: 1b69dbd94cfa54a0d467ba0100fee2b7a788775d SHA-256: bb7d0ca888b8be57c5486f7b2ce37b7db4b5636fafcb31ea2e893a4df3e54eca
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a malicious domain, masquerading as a game hack generator. The ML classifier strongly indicates maliciousness, and the heuristics confirm the use of redirector links and a lure for free game items. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lead the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/free-spin-apps-coin-master-game-hack In PDF document text
    • http://www.pleiadisrl.it/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/coin-master-free-account_GM406889139.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/mistplay-robux_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/freerobux-co_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/como-hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/websites-to-get-free-robux_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_003_off0000472b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x472B 24820 bytes
SHA-256: 88b112cbea18a8eaeb22d0465c8294c21db5507911fb7947ccb04dd34e5509d3
font_01_sfnt_off00008087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8087 17920 bytes
SHA-256: c91f58dff042425bd39551209570be374531c24fad93c4b840c062d659879362

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