Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1611a650a216856…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 19:06:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e34f5fe211f5c0ff4ddc8618c48c30eb SHA-1: 085c0d27280db61a7c74cd2a8b2c2b1826a24fb9 SHA-256: d1611a650a21685680f8f274bb7cb437690d5d40f58f2366658e1cd306be1f84
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous URLs and text related to obtaining free in-game currency or followers, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URIs further supports a malicious intent to redirect users to potentially harmful content. The document's content and embedded links suggest it is designed to trick users into downloading a second-stage payload.

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/835599320/free-tiktok-followers-no-downloads-game-hack In PDF document text
    • http://www.stttekstil.ac.id/elib/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-hack-pc_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/robux-free-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/robux-free-hack-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/robux-code-redeem-free_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/do-free-robux-websites-work_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/tiktok-free-hit_GM835599320.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/http-roblox-hack-mobile-generator-net_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-cheat-engine-speed-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/https-wwwrobloxcom-games-202120217-sponsoredfreerobux2021-about_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-reedeem-codes_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/eran-robux-free-robux-vrobux-com-ytb_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-roblox-injector_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-hack-to-get-a-girlfriend-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-free-spin-generator-without-human-verification_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_off0000325f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x325F 21976 bytes
SHA-256: 786fba0599d50ba6ad0b5f7a597a8f602aa050a3e268c86a1506937b504bd71f
font_01_sfnt_off000062f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F7 18552 bytes
SHA-256: 005421157cd2e1be100a66c3029cd5179940b76951977fce39b1ee215ef4b3da

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