Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac3d7b29b4a21ab8…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 00:23:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 8f04e5ec1b3841640bc71f269711c9a1 SHA-1: f8f54229a5818f094b7c5c8d957b8870bde3fde7 SHA-256: ac3d7b29b4a21ab8141489c6832b12e4c68bda3dfe669752807397e8d9d85222
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'generators'. The primary lure URL is http://netcdn.tw/app/406889139/coin-master-gift-link-hack-game-hack, which is associated with a critical heuristic firing for malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to drive users to potentially malicious websites for further exploitation.

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-gift-link-hack-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-flip-master-coins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-116-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-free-gamepasse-script-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-free-download-mobile_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/ass-hurt-free-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-robux-no-phone-number_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-when-will-world-zero-release-for-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-hack-100-working-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/best-free-hacked-client_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-generator-no-survey-no-download-no-human-verification_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
font_00_sfnt_off00003136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3136 22752 bytes
SHA-256: 14c7545b51dfbbb07dd01705abe20b52b16024bbb402e1fa226d8339e3aa2a31
font_01_sfnt_off000063cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63CC 18004 bytes
SHA-256: 9b6e6c51a93c1278afe1d7f09cc283bbef7911b03c5c76ddcdd4f2fa6fb351ff

Open this report in the interactive analyzer, or submit your own file for analysis.