Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca9d6f99ea10fc35…

MALICIOUS

PDF

45.3 KB Created: 2021-06-11 01:34:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d9b95013fec2580f166640e1c97d477c SHA-1: 75c8ddf9de2f6e502cd74fd0cf6f38fb10b2910a SHA-256: ca9d6f99ea10fc35e1c697bba7403e6e14bdcea6cf37a979eae9e3c23ee6000f
160 Risk Score

Malware Insights

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

The PDF contains a lure for a 'free generator / game hack' which links to known malicious redirector infrastructure. The ML classifier also flagged this PDF with high confidence. The embedded URL is likely intended to download and execute a second-stage payload, aligning with common phishing tactics.

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.tw/app/431946152/hack-jailbreak-roblox-2021-menu-game-hack In PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-free-spins-2021-app-download_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/app-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-earn-free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/10-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/pokemon-go-free-hack-download_GM1094591345.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-make-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coin-and-spin_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/hackear-juego-coin-master-espaol_GM406889139.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
stream_004_off000052d9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52D9 25100 bytes
SHA-256: b86c1d8f24a3f175d4367007eaf2da7e1dff29056c15be051b41e06e3fcbe63c
font_01_sfnt_off00008bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BBC 19204 bytes
SHA-256: 895ddf84d325d4038933c9930899c4dd4b4cb36cc1613e8d9eeb8981791a3ae0

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