Malicious PDF — malware analysis report

Static analysis result for SHA-256 24c9ae52d52b373c…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 22:21:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: a260e0f3b536b7ac8650cd434a540b9a SHA-1: 5041666cbf60d36a96ab6bc3896a20072837a3b7 SHA-256: 24c9ae52d52b373c58798e0ba48b7a3e557382f2c01884d7355c3c3ec72e8785
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' for games like Coin Master and Roblox. The document body and embedded URLs strongly suggest a lure to a scam or potentially a downloader for further malicious content. The ML classifier also flagged this as malicious with high confidence.

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/406889139/today-coin-master-spin-free-game-hack In PDF document text
    • http://digilib.uim.ac.id/repository/free-executor-roblox_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/one-piece-treasure-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-spin_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-hack-tool-pc_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-do-you-get-free-robux-without-buying-apps_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/pokemon-go-free-incense-promo-code_GM1094591345.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/mcpe_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-bling-bling-card-coin-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
font_00_sfnt_off00003097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3097 23016 bytes
SHA-256: 01352c797243643e7325af61aa0696e173b687dba6c4f816f5271361cf3c6b20
font_01_sfnt_off00006438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6438 18528 bytes
SHA-256: e2ba7301b642d01bbb1534f76a73ee61ba5af41067a1fa1e156a956a78038ecf

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