Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b61388fcd5d201c…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 04:43:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 6469691afe2e16db45d1b5b9a32a0292 SHA-1: 0f9846bf29fb994a99c42d3e51e6c4e1c37a3552 SHA-256: 2b61388fcd5d201c4dc919819ee15cbb0f469933307a12493c5f3508bd1a6a96
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to free Robux and game hacks to entice users. It contains multiple links, with a primary one pointing to a known malicious redirector infrastructure. The document's content and embedded URLs suggest an attempt to lead the user to a site that likely hosts further malicious content or phishing schemes.

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/431946152/how-much-robux-can-you-get-with-1-million-dollars-game-hack In PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-get-free-robuxs-by-surveys-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/roblox-company-robux-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-red-spikey-hair-roblox-that-is-actually-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/boku-no-roblox-infinite-spin-hack-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/roblox-tower-battle-hack-script_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-hacks-for-gold-cards_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/get-free-800-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/roblox-tree-planting-simulator-hacks-pastebin_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-robux-sign_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/games-to-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/easy-robux-today-com_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_off00002e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E8E 22760 bytes
SHA-256: 95372bd33b983a1fe5c816082abf1ed9c26c7720079c074bd0b222b8fd698650
font_01_sfnt_off00006112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6112 20008 bytes
SHA-256: 723916b35449ed955ae15cf7f12f067bf8ea2f6a06f44dabbda2bc1e5f6077fd

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