Malicious PDF — malware analysis report

Static analysis result for SHA-256 37ac224d448a501d…

MALICIOUS

PDF

35.4 KB Created: 2021-07-06 12:05:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a04ad840c07012fbc29efdb1c1cc24fc SHA-1: 6ae2a6ab574fe4604ccea95a94d2c9ca1ebc2ae0 SHA-256: 37ac224d448a501db747f844aad8b7822c4f9f7002bc62b11412ffacebda4c7e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appears to be a game hack or free currency generator. The primary link, http://netcdn.tw/app/406889139/free-coins-and-spins-coin-master-2021-game-hack, is flagged as a malicious redirector. The document's content and embedded links strongly suggest a phishing or scam attempt to direct users to potentially harmful websites. No scripts were extracted, but the document structure itself facilitates the malicious redirection.

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/free-coins-and-spins-coin-master-2021-game-hack In PDF document text
    • https://elearning.mtsnkotabatu.sch.id/__statics/gudangsoal/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkotabatu.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnkotabatu.sch.id/__statics/gudangsoal/files/roblox-admin-hack-v3rmillion_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkotabatu.sch.id/__statics/gudangsoal/files/pokemon-go-free-walk-android_GM1094591345.pdfIn PDF document text
    • https://elearning.mtsnkotabatu.sch.id/__statics/gudangsoal/files/coin-master-hack-online-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnkotabatu.sch.id/__statics/gudangsoal/files/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnkotabatu.sch.id/__statics/gudangsoal/files/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnkotabatu.sch.id/__statics/gudangsoal/files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkotabatu.sch.id/__statics/gudangsoal/files/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnkotabatu.sch.id/__statics/gudangsoal/files/tiktok-free-recharge_GM835599320.pdfIn PDF document text
    • https://elearning.mtsnkotabatu.sch.id/__statics/gudangsoal/files/cute-drawings-free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkotabatu.sch.id/__statics/gudangsoal/files/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnkotabatu.sch.id/__statics/gudangsoal/files/hack-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnkotabatu.sch.id/__statics/gudangsoal/files/coin-master-free-spin-redeem-code_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnkotabatu.sch.id/__statics/gudangsoal/files/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnkotabatu.sch.id/__statics/gudangsoal/files/roblox-free-stuff-for-avatar_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkotabatu.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkotabatu.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkotabatu.sch.id/__statics/gudangsoal/files/hack-tool-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkotabatu.sch.id/__statics/gudangsoal/files/cheat-roblox-2021-bee-swarm-simulator_GM431946152.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
stream_002_off0000323b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x323B 23096 bytes
SHA-256: bf83b291b954bd22500099f54cf0cc250f0586779b5b2b1cf7f23229e3e0203d
font_01_sfnt_off00006661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6661 18752 bytes
SHA-256: 2808497b37fc1d4f34a1fffc3dd5e81983cd3403e98677a9ba5497e95ebc42c8

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