Malicious PDF — malware analysis report

Static analysis result for SHA-256 04811e5a212ec809…

MALICIOUS

PDF

44.3 KB Created: 2021-06-10 23:48:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a5ec6cce0c12cf02e7e9bb92110b65e0 SHA-1: 753257c54287e04d03228e00eb8d5fcad5a12476 SHA-256: 04811e5a212ec8091dcdb0a0ac897e2f00f6b77ee025811ddf38d94dae91248d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a visual call-to-action, strongly suggesting a phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious with high confidence. The document body text and embedded URLs indicate a lure related to free Robux and games, a common theme in social engineering attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/431946152/5-games-that-give-u-free-robux-game-hack In PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/mcpe-com_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-tiktok-invitation-template_GM835599320.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/robux-generator-online-free_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-group_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-tiktok-fans-no-verification-2021_GM835599320.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-hack-apk-july-29_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-roebucks_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/robux-online_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-hack-attack-wiki_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-free-shoulder-friend_GM431946152.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_off00005141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5141 24040 bytes
SHA-256: 05107f45e870ab959283090491d7c0f0007d07615ddda1b275041ab71aebae50
font_01_sfnt_off00008798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8798 19324 bytes
SHA-256: d26368403b554b21cdc3c5d1e781fe9a220f0616fa7e208893fe46a5a5d22e4f

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