Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae48d691745d5610…

MALICIOUS

PDF

35.1 KB Created: 2021-07-04 19:17:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b51455428f8d505d072717d8122077f8 SHA-1: 4dd5f9b9b31f6a7af5c98529b9525f3f148e6718 SHA-256: ae48d691745d561061971f731998bbf2403e36ffc50c4a7a1865c2227ef25c69
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs, with a primary focus on luring users with game hack promises. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' indicates that the document links to a redirector for a 'free generator / game hack'. The primary IOC, http://netcdn.tw/app/406889139/hack-coins-in-coin-master-game-hack, is directly associated with this lure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a social engineering tactic to drive users to malicious sites, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/hack-coins-in-coin-master-game-hack PDF link annotation
    • http://elibrary.perludem.org/repository/free-robux-generator-unblocked_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/hack-somone-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-offline-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hacks-counter-blox-roblox-offensive-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-event_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/wrd-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-elemental-battlegrounds-hacks-win-10-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-doge-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-by-roblox-events_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/corn-master_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_002_off00003174.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3174 23772 bytes
SHA-256: 810d62118ffc5eea4bd74aab96e590139fe0bd10d8f4830cfd38f9ddfe885f2b
font_01_sfnt_off00006781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6781 18004 bytes
SHA-256: 97a583b0a3e69f2f5f434e768b16a64681d06eacdc187232e3f87ce02c39dd89

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