Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd532d761407ebf…

MALICIOUS

PDF

35.6 KB Created: 2021-07-05 19:49:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f7f71748be69f72db674c43552113c00 SHA-1: 1caff19c1a9d6f9f7ae4fdfa28eb2fd70d13a878 SHA-256: 3fd532d761407ebf82834802aa3e6bebc00616032642b367ba1ab1549acbd469
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and free in-game currency. The primary lure appears to be a 'Coinmasterdailyfreespins' generator, which redirects through netcdn.tw. The document's structure and embedded URLs suggest a phishing or scam attempt to lure users to potentially malicious sites. No scripts were extracted, but the PDF's nature and embedded links strongly indicate a social engineering attack.

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/406889139/coinmasterdailyfreespins-com-game-hack In PDF document text
    • http://e-learningman14jakarta.com/__statics/gudangsoal/files/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://e-learningman14jakarta.com/__statics/gudangsoal/files/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://e-learningman14jakarta.com/__statics/gudangsoal/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://e-learningman14jakarta.com/__statics/gudangsoal/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learningman14jakarta.com/__statics/gudangsoal/files/logiciel-hack-roblox-robux_GM431946152.pdfIn PDF document text
    • http://e-learningman14jakarta.com/__statics/gudangsoal/files/how-to-hack-anyone-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://e-learningman14jakarta.com/__statics/gudangsoal/files/how-to-get-free-robux-kazok_GM431946152.pdfIn PDF document text
    • http://e-learningman14jakarta.com/__statics/gudangsoal/files/daily-coin-master-free-spin-link-facebook_GM406889139.pdfIn PDF document text
    • http://e-learningman14jakarta.com/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://e-learningman14jakarta.com/__statics/gudangsoal/files/exploit-roblox-free_GM431946152.pdfIn PDF document text
    • http://e-learningman14jakarta.com/__statics/gudangsoal/files/como-conseguir-el-egg-hunt-de-hacker-roblox_GM431946152.pdfIn PDF document text
    • http://e-learningman14jakarta.com/__statics/gudangsoal/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://e-learningman14jakarta.com/__statics/gudangsoal/files/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learningman14jakarta.com/__statics/gudangsoal/files/hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://e-learningman14jakarta.com/__statics/gudangsoal/files/coin-master-hack-software_GM406889139.pdfIn PDF document text
    • http://e-learningman14jakarta.com/__statics/gudangsoal/files/claim-gg-earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://e-learningman14jakarta.com/__statics/gudangsoal/files/how-to-get-a-free-roblox-group_GM431946152.pdfIn PDF document text
    • http://e-learningman14jakarta.com/__statics/gudangsoal/files/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://e-learningman14jakarta.com/__statics/gudangsoal/files/free-robux-group_GM431946152.pdfIn PDF document text
    • http://e-learningman14jakarta.com/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021_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_002_off0000330f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x330F 23160 bytes
SHA-256: ae863aef0649868c675b52c60ad9a978809fba2d490f02eaa72d7a26bf996ef2
font_01_sfnt_off00006759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6759 18696 bytes
SHA-256: ce456eb17f2db1915b327d416d1e6d0ed8e1fdec420ac0cee82ca000bfaa5c3f

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