Malicious PDF — malware analysis report

Static analysis result for SHA-256 39629e0cd4f1dd0f…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 10:19:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a723c303939a8680c3573eb78eaa26bf SHA-1: 8cd80926a30940b540479a82f0dfe48f7cffeef4 SHA-256: 39629e0cd4f1dd0f82b0d2d9819475fbbbe8a0aad09773343e6b4112a0d2dd3e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures. The primary URL, http://netcdn.tw/app/431946152/console-hack-robux-no-subscribe-2021-game-hack, is identified as a malicious redirector. This indicates a phishing or scam attempt designed to trick users into visiting potentially harmful sites.

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/431946152/console-hack-robux-no-subscribe-2021-game-hack In PDF document text
    • http://www.perpus.stfm.ac.id/repository/tiktok-free-view-quest_GM835599320.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/i-hacked-into-someones-roblox-acout-there-password-was-pppppppp_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/play-games-for-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-roblox-apk_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/mistplay-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-and-spin_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coinmaster-spin-ml-free_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/pubg-uc-2021_GM1330123889.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-get-free-coins-and-spins-on-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_off00002f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F76 22196 bytes
SHA-256: 47097fac64ffe50382d518f70039a1b462cf7bb1e56831d5971e85c71a274802
font_01_sfnt_off000060a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A7 19132 bytes
SHA-256: b54e5f44864cd0afc8fc754a43e4d125faf0a2f34187570a44a912c08eb44c4f