Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8ff58ffc8a10eca…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 18:48:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a3589b4aa3f3cb1bf760748f6d4ca978 SHA-1: eb0e5eb4468db90fa33670b1bbbbf6b55bec41a3 SHA-256: a8ff58ffc8a10eca18ba2f3366b37db0858e9f486b9c957dfa2d0f96b3382991
160 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, including one pointing to 'netcdn.tw/app/479516143/best-minecraft-hacks-game-hack', suggesting a lure for potentially unwanted software or malware. The ML classifier strongly flagged this PDF as malicious. The document body and heuristics indicate a theme of game hacks and cheats, likely intended to trick users into downloading malicious payloads.

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.tw/app/479516143/best-minecraft-hacks-game-hack In PDF document text
    • http://www.peterbarsony.com/userfiles/files/robux-survey_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/free-card-codes-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/free-robux-robuxking_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/oginject-co_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/how-to-looks-good-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/free-robux-no-catch_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/console-free-admin-roblox_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/mcpe-download_GM479516143.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/halo-roblox-royal-high-hack_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/how-to-get-1-million-robux-free-birth_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/coin-master-jackpot-hack_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/cheats-infinte-jump-roblox-fe2_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/minecraft-building-hacks_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_off00003152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3152 22596 bytes
SHA-256: 40b9e2684dd858577746122ddb79a51c304adf260237b427090c8318813c364b
font_01_sfnt_off000063ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63AE 18244 bytes
SHA-256: f821bf363e8afb777fdbc572f78f6060afc62af876dbe242638ec49acd5a6fa7

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