Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2400607e5e7c11d…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 17:58:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 57d1ec271cd5fe32196e808db95e3cd0 SHA-1: 1e4680aa8692aa639da3abe91d20ee7190bcbaed SHA-256: d2400607e5e7c11d47de55184bd1bb8bfbe2a080391f5eec0ca219855221cf16
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/406889139/60-free-spins-coin-master-game-hack PDF link annotation
    • http://library.stipjakarta.ac.id/etd/repository/hack-roblox-cheat-engine-67_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-roblox-toy-code-june-2021_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-get-roblox-hacked-account-back_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/codes-for-free-sp-in-ice-cream-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/hacks-para-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-get-a-free-gravity-coil-in-all-roblox_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-how-to-walk-through-walls-without-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/hack-para-jailbreak-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-free-accounts-and-passwords_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-promos-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-roblox-generator-2021_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/break-free-roblox-music-id_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/pubg-uc-murah_GM1330123889.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-get-free-roblox-toys_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_off00003283.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3283 23116 bytes
SHA-256: a465699ef4e32cd690ffdc8f7533f6c1cad0376e77e02db14f1c3875337e23b0
font_01_sfnt_off00006679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6679 18516 bytes
SHA-256: 9c110acbe1bdea99191041174f21e13522cf76b2385bd88ae7104caf738e615a

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