Malicious PDF — malware analysis report

Static analysis result for SHA-256 934d239c541cb290…

MALICIOUS

PDF

48.1 KB Created: 2021-06-03 08:52:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 0b6d7e8f960a6b9e18f61598211627ec SHA-1: ead94a1d4163cb3b0219f966a0fd1a67229e3570 SHA-256: 934d239c541cb2904a72057d32c6b38bb7b0aa004d7a3645fa2d1c6351e7d3e6
200 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, though heavily obfuscated, contains a URL that matches the heuristic. The presence of a download button lure and password archive instructions further suggest a malicious workflow designed to trick the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 https://netcdn.online/app/406889139/coin-master-gold-cards-hack-english-game-hack In PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/pokemon-go-free-account-username-and-password_GM1094591345.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-hack-game_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-mod-version-free-download-v344_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/dailyrobux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000540b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x540B 25016 bytes
SHA-256: 4d3086e861b56cf7a8ac6beb713f9232a28deb0a36f6d710634793c54c70caae
font_01_sfnt_off00008d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D8E 3400 bytes
SHA-256: 75c3a8e6f5c68e0746f893c922e57fd7e888a21fb038f9ae3eedb0a197a59e24
font_02_sfnt_off000098b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98B2 18420 bytes
SHA-256: c747b30c55f11957bbcc45eb80d86fe9f42e29935af208c56b804fb4c299f143

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