Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae16e5ec25d418b…

MALICIOUS

PDF

35.6 KB Created: 2021-07-03 21:41:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 9fb189c686dd8c0a0f966d566757cca1 SHA-1: 10e16b68f5d2bcb92449dea11f574d0015ff955d SHA-256: 2ae16e5ec25d418b5653fe87980b396dc183c5a83536eaef8ccfc5055eb3e4f2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising 'free generator / game hack' lures. The primary malicious URL identified is http://netcdn.tw/app/406889139/coin-master-daily-free-spins-haktuts-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites, likely for credential harvesting or further malware delivery.

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-daily-free-spins-haktuts-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-hack-gui-tutorial_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-no-verify-or-download_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-hacking-prison-life_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/girl-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/strucid-aimbot_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-hack-in-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-no-human-verifica_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-fre-robux-2021-novmber_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spin-link-for-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-you-get-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/script-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/minecraft-windows-10-free_GM479516143.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_off0000323d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x323D 23228 bytes
SHA-256: 8ae0428a2c2e52e5ce6ee5f945aef73d6d7c76010385c731d916d8e578d989d5
font_01_sfnt_off00006691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6691 18904 bytes
SHA-256: 0b299e5244b957eb55f444db301ffff8b752e3127c4da8eddab8340a40506082