Malicious PDF — malware analysis report

Static analysis result for SHA-256 aac7efd68be46b05…

MALICIOUS

PDF

47.0 KB Created: 2021-06-03 10:24:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 96f3269df42cefefe9d342059ea38f45 SHA-1: 064b1493612bc8a4e8baddd7efae3e727531d84a SHA-256: aac7efd68be46b054f53316d66da4da4da821c89fba27e339d9b6069db15036d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links to known malicious redirectors, masquerading as game hacks or generators. The primary malicious URL identified is https://netcdn.online/app/431946152/rbxdemon-game-hack. The presence of a download button lure and the ML classifier's high confidence score further support the malicious nature of this document. No scripts were extracted, but the embedded URLs are sufficient to indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/rbxdemon-game-hack In PDF document text
    • http://opac.library.uib.ac.id//repository/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/play-coin-master-online-free_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-free-spins-iphone_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-hack-355_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/is-roblox-free-on-xbox_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/claim-roblox_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
    • https://robuxhaxs.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000500c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x500C 25536 bytes
SHA-256: d139c1b603c1d40261ddb89a2aa161130ae73f61e294f3db690f4cc273f56031
font_01_sfnt_off00008b69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B69 2844 bytes
SHA-256: d4efd49219a7ff6424c923a6ccef5b7e1750ded18bbd79546f2ad196ddc76c43
font_02_sfnt_off00009528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9528 18144 bytes
SHA-256: 84e994ea3e0766e4b6b44f1efc08852f1b1b6721f581ba32b946cb803bfb180d

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