Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2eecf4e8cf7fd2…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 19:32:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 3acdc4cc0d93524d774dc37ee18a69c6 SHA-1: 23f075b06e1d6d999ab4af68ccdc661ba5ceb61f SHA-256: 5e2eecf4e8cf7fd2bca99893a8efae4ec755200923f6461e9d09d74f464173af
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, specifically http://netcdn.tw/app/406889139/coin-master-free-coins-game-hack, which is disguised as a game hack generator. The document body and embedded URLs reinforce this lure by mentioning game hacks and free currency. The presence of these links strongly suggests the document's purpose is to redirect users to malicious sites, likely for further exploitation or credential harvesting.

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/coin-master-free-coins-game-hack In PDF document text
    • http://www.library.umbjm.ac.id/repository/mcpe_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-master_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/what-tiktok-free-followers_GM835599320.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-teleport-cheat_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-free-robux-no-download-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-apk-2021-download_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_off000030b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30B1 23608 bytes
SHA-256: bee45ba5bde1087fba66f08e25a320eda84ad5d00d2815730070148a0cbd52f2
font_01_sfnt_off0000663c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x663C 17996 bytes
SHA-256: 2ec206c530faa3d40eac36f14655b3e9b935e9ff12c648634e177d5bc9421463

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