Malicious PDF — malware analysis report

Static analysis result for SHA-256 998eb36c250f389a…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 14:13:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 362fd7b6770fa2842d75d95b17d4d165 SHA-1: 1c04fbf49edc5a903f8e127a356ff7ddf0d4899b SHA-256: 998eb36c250f389a07910a2cf058cb54135913d8890536a518f0e076d95e97f6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. The document body and embedded URLs reinforce this, suggesting the primary goal is to trick users into visiting a malicious site. While no scripts were extracted, the PDF structure and embedded links indicate a likely attempt to exploit vulnerabilities or deliver a payload upon redirection.

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/479516143/windows-10-minecraft-free-with-java-game-hack In PDF document text
    • http://library.umla.ac.id/repository/boku-no-roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/wurst_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/freecoins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/arsenal-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/working-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-game-hacking_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/cardcode-pw-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-game-free-spin_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/hackear-coin-master-sin-verificacion_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-version-download-ios_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/00-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/tiktok-free-like-and-views_GM835599320.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/codes-to-get-free-robux_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_off00002e7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E7E 22024 bytes
SHA-256: 0a68ba1e48ecea266f644ec6a3b006e984f95132d4f0fdb390f1b28d1c659b0c
font_01_sfnt_off00005eec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEC 19256 bytes
SHA-256: eea5e391dc736ec406f1afee7f54aeea738f4d4feb83311ecd5a02063b60f52f

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