Malicious PDF — malware analysis report

Static analysis result for SHA-256 d077c5186983d790…

MALICIOUS

PDF

49.0 KB Created: 2021-06-04 00:49:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e9cdcd0cff7042c7b1c86e2a467c1e7a SHA-1: 3a6dea07200501b3a8b8e389ae72e308b39eaf63 SHA-256: d077c5186983d7909b983141553fc950f96312f4e9a4af1479bc2c72441c7c1b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks or generators. The primary link, https://netcdn.online/app/431946152/free-robux-no-verification-2021-android-game-hack, is identified as a malicious redirector. The document body and embedded URLs reinforce the lure of free in-game currency or hacks, aiming to trick users into clicking through to potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/431946152/free-robux-no-verification-2021-android-game-hack In PDF document text
    • http://lib.vipklh.ru/repository/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-hack-mod-game-download_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-spins-link-2021-march_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-spin-app-iphone_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-daily-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://collectrobuxIn 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
stream_004_off0000537b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x537B 25384 bytes
SHA-256: 79e6e98118a2e5b4549ad38b7e33872ef9e30eade5327d9ea30f278b7cb735ab
font_01_sfnt_off00008d6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D6F 3884 bytes
SHA-256: 64ea6bfd232c3abde76d8b86727203bfa3f935a5783cd0c1f642cf6d3fb42b29
font_02_sfnt_off00009a17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A17 19176 bytes
SHA-256: 2db8195158682863467aa5049c27493158ce29af4e73d213a7d216c5b0c72741

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