Malicious PDF — malware analysis report

Static analysis result for SHA-256 87636f1b571de502…

MALICIOUS

PDF

33.5 KB Created: 2021-07-03 11:29:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 23bad78523747782888c0f48a168cc93 SHA-1: c2bae957b5e5a5098d08cb97b1113e2a51c3a1ca SHA-256: 87636f1b571de502a9459e646bfc629f2c475a2834e93efd3541736f868b730c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to redirector infrastructure, including a primary link to 'http://netcdn.tw/app/406889139/spin-and-coin-game-hack'. The document body and heuristics indicate a lure for 'free generators' or 'game hacks', suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure strongly suggest an intent to redirect users to malicious sites for further exploitation or payload delivery.

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/spin-and-coin-game-hack In PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/hack-week-2021-roblox_GM431946152.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/cheat-lumber-tycoon-2-roblox_GM431946152.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/coin-master-free-spin-2912-2021_GM406889139.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/lazyblox-com-free-robux-ad_GM431946152.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/play-roblox-theobbypros123-acount-for-free_GM431946152.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/free-robux-ad_GM431946152.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/robux-gift-card-for-free_GM431946152.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/roblox-free-exploit-lvl-6-september-2021_GM431946152.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/free-roblox-website_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
font_00_sfnt_off00002ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC2 22516 bytes
SHA-256: 365ab4eb9329e5d2a8fc553179feaa41dffb0c701c3b2c65e0a49b23f52f5c64
font_01_sfnt_off000060bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BB 18080 bytes
SHA-256: 012df21d0068cf60c223a53958773a0d059661452b676895ba6a235f4df9029a

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