Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c944f8778c9aea4…

MALICIOUS

PDF

45.7 KB Created: 2021-06-03 11:51:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 250b1ac5e30ef4517793012047bc74bf SHA-1: 66e7fa85c45b5a1b9d2930d07e32389d24ce709f SHA-256: 9c944f8778c9aea4a1218745c375b80aaaf861613855c1484e71a961a5fea98f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and free currency. The primary redirect URL is https://netcdn.online/app/431946152/www-rbx-com-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristics indicate a lure designed to trick users into visiting these malicious sites, likely as a first step in a phishing or malware delivery chain. The ML classifier strongly supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.online/app/431946152/www-rbx-com-game-hack In PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-vip-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/hack-coin-master-apk-358_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/make-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/is-pokemon-go-fest-free_GM1094591345.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/pubg-uc-2021_GM1330123889.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/minecraft-pocket-edition-free-ios_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-hack-version-ios_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_off000053bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53BB 26448 bytes
SHA-256: 146b680709ef194090dc3c041f1cf6f8e28394d588bfa15f6f7f52c228d6d1fb
font_01_sfnt_off00008fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FEE 18332 bytes
SHA-256: 03a37bf507e0cad9bcf1387ae82c646cdce41af5350e7d54064c0facdd896ae5

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