Malicious PDF — malware analysis report

Static analysis result for SHA-256 89becbcc1131c5e1…

MALICIOUS

PDF

35.7 KB Created: 2021-06-28 20:30:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cf4a861bdfd60e88f889829ee78f0c0d SHA-1: 7c518e1ae1cd8c82e2b31a81a72f93a594e0fcc1 SHA-256: 89becbcc1131c5e11b8385908f8c4f09f382c08b837b0e19b0a06430b32f84ba
160 Risk Score

Malware Insights

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

This PDF document contains links that redirect to malicious infrastructure, specifically promoting 'game hacks' and free in-game items. The primary lure is the URL http://netcdn.co/app/431946152/hacking-roblox-jalibreak-game-hack, which is associated with known malicious redirectors. The document's content and embedded links suggest a phishing or scam attempt 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.co/app/431946152/hacking-roblox-jalibreak-game-hack In PDF document text
    • https://silvterie.com.br/images/ckfinder/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/pokemon-go-free-lures_GM1094591345.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/how-to-get-any-gamepass-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/apps-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/free-robux-hack-an-orator-club_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/free-5-robux-site_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/roblox-dragon-ball-rage-stats-hack-site-v3rmillionnet_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/free-gift-cards-code-for-robux_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B4 23452 bytes
SHA-256: 1d9caa7118247cf960e222ce648e3e9863781cd825f4968fc398c003337dc974
font_01_sfnt_off000066d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D0 18944 bytes
SHA-256: 0e6d89bd290a57d9fbd8f504ea00e404bba71acb9400b6466641d77bb77dc447

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