Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a1671b18e97b1b4…

MALICIOUS

PDF

35.9 KB Created: 2021-07-08 12:19:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c1e539407e3b09a5073965925ffa12bc SHA-1: a59183d977a8faf88c94b2b21944cf72e0ccc54e SHA-256: 1a1671b18e97b1b45f18d1438473e87410b5266af099e0a0e01319f63b0590ba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a "free generator / game hack" lure, specifically targeting "Coin Master" players. The primary link, http://netcdn.tw/app/406889139/coin-master-spin-hack-2021-game-hack, is flagged as a malicious redirector. While no scripts were extracted, the document's structure and embedded URLs strongly suggest a phishing or scam attempt designed to trick users into visiting malicious sites.

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/coin-master-spin-hack-2021-game-hack In PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/coin-master-free-items_GM406889139.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/easy-robux-generator_GM431946152.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/top-10-mejores-hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/hack-prison-life-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/huge-free-robux-giveaway-free-robux-giveaway-livesteream_GM431946152.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/coin-master-daily-bonus-hack_GM406889139.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/roblox-hacks-compatible-with-vantage-computers_GM431946152.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/free-bobux_GM431946152.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/coin-master-hacks-no-downloading_GM406889139.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/roblox-render-free_GM431946152.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000035b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35B1 22812 bytes
SHA-256: 518020343585f3d6ed4b89c146470cb80454c06248bbca72235a05aec3607e87
font_01_sfnt_off000068cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68CB 18580 bytes
SHA-256: 63d6adc7563b485c3174704ac8a7a6a262dc9bf1deaf17837918a23c7f43ebb5

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