Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3317e5cfdc72322…

MALICIOUS

PDF

35.1 KB Created: 2021-07-03 12:09:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7cc9d6a78f5a452dc547d75a0582ffe4 SHA-1: ff7b36887b82e2d55729b3e655e82c0fdf77cea3 SHA-256: b3317e5cfdc723220aa36ce414e2ff58c9d04778444852d00a85234e5bb0573e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a lure for free Robux, which is a common tactic for phishing and scamming operations. The presence of an external URI pointing to a site offering 'how to get free robux' strongly suggests a malicious intent to redirect users to a potentially harmful website. The ML classifier also flagged this PDF with high confidence, reinforcing the suspicious nature of the document.

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/431946152/how-to-get-free-robux-without-human-verification-game-hack In PDF document text
    • https://e-learningmin10jakarta.com/__statics/gudangsoal/files/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://e-learningmin10jakarta.com/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • https://www.e-learningmin10jakarta.com/__statics/gudangsoal/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.e-learningmin10jakarta.com/__statics/gudangsoal/files/online-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://e-learningmin10jakarta.com/__statics/gudangsoal/files/hack-de-robux-2021-diciembre_GM431946152.pdfIn PDF document text
    • https://www.e-learningmin10jakarta.com/__statics/gudangsoal/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • https://www.e-learningmin10jakarta.com/__statics/gudangsoal/files/hacks-para-roblox-bee-swarm-simulator_GM431946152.pdfIn PDF document text
    • https://www.e-learningmin10jakarta.com/__statics/gudangsoal/files/roblox-hax_GM431946152.pdfIn PDF document text
    • https://e-learningmin10jakarta.com/__statics/gudangsoal/files/minecraft-free-download_GM479516143.pdfIn PDF document text
    • https://www.e-learningmin10jakarta.com/__statics/gudangsoal/files/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
    • https://e-learningmin10jakarta.com/__statics/gudangsoal/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.e-learningmin10jakarta.com/__statics/gudangsoal/files/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://www.e-learningmin10jakarta.com/__statics/gudangsoal/files/hack-mot-de-passe-roblox_GM431946152.pdfIn PDF document text
    • https://www.e-learningmin10jakarta.com/__statics/gudangsoal/files/free-robux-android_GM431946152.pdfIn PDF document text
    • https://www.e-learningmin10jakarta.com/__statics/gudangsoal/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://www.e-learningmin10jakarta.com/__statics/gudangsoal/files/stella-download-roblox-hack_GM431946152.pdfIn PDF document text
    • https://e-learningmin10jakarta.com/__statics/gudangsoal/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.e-learningmin10jakarta.com/__statics/gudangsoal/files/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • https://e-learningmin10jakarta.com/__statics/gudangsoal/files/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learningmin10jakarta.com/__statics/gudangsoal/files/how-to-get-free-robux-2021-without-human_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_off00003220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3220 21744 bytes
SHA-256: 53b9cffce60c04b79e8a095594e05ce32780ca22996661ee5b97291357986bdf
font_01_sfnt_off000061b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B8 19860 bytes
SHA-256: 495fe8ab67ccc92980b130970b14ca59a4055a895de5252c8ccba287623abf67

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