Malicious PDF — malware analysis report

Static analysis result for SHA-256 31b596d2860ef9cd…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 22:51:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 8f845de0a70c3fe066587e38ef0224a4 SHA-1: 0a10e75393b7067bd1b6cb5e1f9f151507877b85 SHA-256: 31b596d2860ef9cdd9a4a58f314fc77cbe5f363c9c505c70b0fd16896abca84a
160 Risk Score

Malware Insights

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

This PDF document employs a lure related to game hacks and free currency, directing users to a known malicious redirector. The document body and embedded URLs strongly suggest a phishing or scam attempt designed to lead users to potentially malicious sites. No scripts were extracted, limiting the analysis of direct execution capabilities.

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-to-hack-a-roblox-account-2021-game-hack In PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-get-robux-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/pastebin-robux-hack_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-download_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-hack-generator-no-app-download_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-from-form-tampering_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/everything-free-on-roblox-catalog_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-cheat-comands_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/hack-para-roblox-apocalypse-rising-2021_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-free-level-7-exploit-2021_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_off00002f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F80 22452 bytes
SHA-256: c702d041f3fc9d2a2043f9c9c1b53ef2cde1408758d1672dc4f4ee365f909c57
font_01_sfnt_off0000617b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617B 19468 bytes
SHA-256: 8490c018c81cc22f14dab8ddf5d074d9e4c4287532f70e565512aa2c5e2164f3

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