Malicious PDF — malware analysis report

Static analysis result for SHA-256 387e791f91ba78e9…

MALICIOUS

PDF

44.4 KB Created: 2021-05-18 00:43:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f857df395c8120c790a4445423126968 SHA-1: 6eca4465b2bdb56bb35e7c57e4b5d7292050f9fc SHA-256: 387e791f91ba78e9eec574772bd433a880a394444fbf86d7e16f40314c185b33
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses a clipboard-command (paste-and-run) lure. 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 0.9648

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/479516143/best-free-minecraft-texture-packs-game-hack PDF link annotation
    • http://cosver.eu/images/com-roblox_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/coinmaster-spin-ml-free_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-daily-free-cards_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/free-spins-october-28-2021-coin-master_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-free-items_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/best-minecraft-hacked-client_GM479516143.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4886 25068 bytes
SHA-256: abb35daea4392b9176b6b13f92f607c575a799d916edf2c159ef6fa4f2230544
font_01_sfnt_off00008064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8064 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00008a73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A73 18460 bytes
SHA-256: 31257519935a968b1de16a3a71cb9b2eaae2afa87081bbe73112141ce1027594

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