Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1973e30841ad95b…

MALICIOUS

PDF

37.1 KB Created: 2021-06-28 17:38:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 283e8a4ba6e82ae567ad6af79a398a1b SHA-1: d28928c7995dbd03f8b2d05c52ee2e58ba896af5 SHA-256: f1973e30841ad95b8c3d43c50048f52408ab78fd650c7af0a3a3aae114a21f90
168 Risk Score

Malware Insights

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

This PDF contains embedded JavaScript and multiple links to known malicious redirectors, masquerading as game hacks or generators. The primary lure is a 'free generator' for Roblox, which redirects to a URL that itself hosts further malicious PDFs. The embedded JavaScript likely facilitates the redirection or exploits a vulnerability to execute a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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/how-to-make-a-roblox-hack-video-thumbnail-game-hack In PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/minecraft-116-apk-download_GM479516143.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/give-free-robux_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/easy-robux-today_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/downlaod-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/roblox-card-pin-hack_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/village-3-coin-master_GM406889139.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/earn-robux-com_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/free-roblox-accounts-2021-that-work_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/hack-coin-master-using-pc_GM406889139.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/roblox-hack-999999-robux-movil_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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_off00003510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3510 23388 bytes
SHA-256: e761ae4d2934e63fdc8c6de62ee5793c7029f4fa8e45a033eea9ceeae166c255
font_01_sfnt_off00006981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6981 20012 bytes
SHA-256: 26c89f2f5952002880c3e4ed760c5d04dcd21c4da62a5a1309ca7ba518589e8b

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