Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f7882897cd67d92…

MALICIOUS

PDF

33.4 KB Created: 2021-07-19 03:21:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2165e65467428eae8d6e40505e19e119 SHA-1: dc4a932bb0281a44d4623655561562b8df232bfe SHA-256: 1f7882897cd67d92040ce50999761ee3010647389a443fddf0a95348f1934de5
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirectors, masquerading as "free generators" for popular games. The document body explicitly contains calls to action like 'CLICK HERE TO ACCESS ROBUX GENERATOR', reinforcing the lure. The embedded URLs likely lead to further stages of infection or phishing, potentially exploiting vulnerabilities or delivering malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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/431946152/free-robux-master-game-hack In PDF document text
    • http://roberto-gac.org/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://roberto-gac.org/images/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • http://roberto-gac.org/images/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://roberto-gac.org/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://roberto-gac.org/images/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://roberto-gac.org/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://roberto-gac.org/images/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://roberto-gac.org/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://roberto-gac.org/images/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://roberto-gac.org/images/minecraft-pe-free-apk_GM479516143.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_off00002ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CCC 22572 bytes
SHA-256: f509870aa4c46187acd28bc131628b056c66a0431783dc5d78f300194c9b85dc
font_01_sfnt_off00005f28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F28 18728 bytes
SHA-256: c36130a063a45563017e09323de84a52060dcd5c611ba01078cf3d59063abc1c