Malicious PDF — malware analysis report

Static analysis result for SHA-256 171a598e6e64ab99…

MALICIOUS

PDF

48.4 KB Created: 2021-06-03 22:44:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c3cf33c7e45bfb397c1f534c0ded96dc SHA-1: 55fc35aaa2e6f99693fa38ab0b51016f0298a8a9 SHA-256: 171a598e6e64ab998a6584cb6e44a498189f4041caa9e93f6473c395ee4d06b8
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free generator / game hack' which redirects to malicious infrastructure. It also displays a fake CAPTCHA to trick the user into interacting with the document. The embedded URLs and the overall structure suggest a phishing or scam attempt designed to lead users to potentially harmful content or further malicious downloads.

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/431946152/roblox-online-free-game-hack In PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/robuxglobalcom-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/static-moonactive_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-spins-link-today-hack_GM406889139.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
font_00_sfnt_off00005183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5183 28144 bytes
SHA-256: dc086bf3f08d3086b016272bfcca50fbe414f2a7c17acbb2349f1461765af2c1
font_01_sfnt_off00009136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9136 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off00009b21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B21 18068 bytes
SHA-256: 065eb5bea139eaf43a54c15370d64aa119270a6f111c6de0f976a0e20a38860d

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