Malicious PDF — malware analysis report

Static analysis result for SHA-256 2961c84d6a44fb79…

MALICIOUS

PDF

43.5 KB Created: 2021-05-15 01:39:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2575fb73a81ebf7e86276ec4dbb5722a SHA-1: d89148f0ee9b933f0a58045f8708de191f10f98c SHA-256: 2961c84d6a44fb792c5270569ea4590230d1ccf317ee0399d4da7c321a913029
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to websites offering 'free generators' or 'hacks' for popular mobile games, a common lure for phishing or malware distribution. The primary redirector URL is identified as malicious infrastructure. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to drive users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/406889139/coin-master-hacks-for-iphone-game-hack In PDF document text
    • https://ktphuhung.com/public/upload/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/withdraw-robux_GM431946152.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/free-robux-please_GM431946152.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/coin-master-free-spins-iphone_GM406889139.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/coin-master-coins-hack_GM406889139.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/how-do-you-earn-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/robux-place-rewards_GM431946152.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/coin-master-daily-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/coin-master-generator-free_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_003_off00004d46.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D46 25800 bytes
SHA-256: 28a8a2bc2ed42b216110f667e8b9fff0aa3f9869c48a636b7e80568043f7790c
font_01_sfnt_off0000882d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x882D 18220 bytes
SHA-256: fc89e6ae8e34fc43d07b937b85ba5464d3670aa366c3571ce16ab017d49e0a6c

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