Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ff39f97267206b4…

MALICIOUS

PDF

36.5 KB Created: 2021-07-04 05:49:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c0780e4061ba9e2e08c6180969c8958c SHA-1: 1e6a067768ae3913946cf463efbdeb41057053ee SHA-256: 1ff39f97267206b4ad99e1dd58b4ea23b6fefc801e06a1b95448136de6426f62
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to external websites that are advertised as 'free generators' or 'game hacks' for popular games. The primary link, http://netcdn.tw/app/406889139/coin-master-hack-no-human-verification-game-hack, is flagged as a known malicious redirector. The document body and embedded links suggest a social engineering lure to drive traffic to potentially malicious or ad-heavy sites. No scripts were extracted, but the heuristic firings strongly indicate a malicious redirector campaign.

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-hack-no-human-verification-game-hack In PDF document text
    • https://fridaytravelnepal.com/userfiles/files/getrobux-now_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-game_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/cheats-to-say-phone-in-roblox_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-free-robux-on-xbox-one-2021_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/mcpe-optifine_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-spin-coin-master-twitter_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-codes_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/fbchampion-com_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-unlimited-spins-apk-free-download_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/cute-free-hair-on-roblox_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_off00003665.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3665 23740 bytes
SHA-256: 0952e478582de5fbea269a09913d99eba23a9ad8369858b0a0943c74452f5a87
font_01_sfnt_off00006b86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B86 18540 bytes
SHA-256: be7925905a3cbe2c3ec6c08efd648bb1fac1fd605dc94fa0f28581d8b5cb9fcb

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