Malicious PDF — malware analysis report

Static analysis result for SHA-256 f51a0fa1df96a83d…

MALICIOUS

PDF

43.1 KB Created: 2021-05-17 20:07:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 34dcec64dc8643d6f96799dccbf818fe SHA-1: 68ce3750cbd18b16f89680e9f1d48dbd0eafb471 SHA-256: f51a0fa1df96a83dee430f525249b5a243460ba681bf1907e9e1dbdd43ba6ae6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/free-spins-in-coin-master-without-human-verification-game-hack PDF link annotation
    • https://vstarnippers.com/images/coin-master-game_GM406889139.pdfIn PDF document text
    • https://vstarnippers.com/images/free-robux-today_GM431946152.pdfIn PDF document text
    • https://vstarnippers.com/images/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • https://vstarnippers.com/images/hack-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • https://vstarnippers.com/images/roblox-gang_GM431946152.pdfIn PDF document text
    • https://vstarnippers.com/images/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • https://vstarnippers.com/images/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://vstarnippers.com/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://vstarnippers.com/images/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • https://vstarnippers.com/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • https://vstarnippers.com/images/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • https://vstarnippers.com/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://vstarnippers.com/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://vstarnippers.com/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://vstarnippers.com/images/hacks-minecraft_GM479516143.pdfIn PDF document text
    • https://vstarnippers.com/images/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • https://vstarnippers.com/images/minecraft-free-reddit_GM479516143.pdfIn PDF document text
    • https://vstarnippers.com/images/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://vstarnippers.com/images/free-robux-accounts_GM431946152.pdfIn PDF document text
    • https://vstarnippers.com/images/www-roblox-com-robux-free_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_003_off00004b23.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B23 26400 bytes
SHA-256: 55ad4ce0c90853cf948b3311d32550832428398b340c1928e820720ff62fe013
font_01_sfnt_off000084d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84D5 18784 bytes
SHA-256: 2f08f52b73595fa95dbe25467555bd1443f7cdd3e7404a9db3231e6e64119a30

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