Malicious PDF — malware analysis report

Static analysis result for SHA-256 774a79d3d77ce7f9…

MALICIOUS

PDF

34.6 KB Created: 2021-06-18 17:58:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d472c0c4069f49476c1a6db88bd6cf53 SHA-1: 70fc3401742eea2dbe79884184a6e4485876d36a SHA-256: 774a79d3d77ce7f960d496acc730b391f5d878eb1f88a0de4889a9a4d266671a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, masquerading as game hacks and free generators. The primary lure directs users to http://netcdn.co/app/431946152/hack-conteur-blox-roblox-game-hack, which is flagged as malicious infrastructure. The document body and embedded URLs reinforce this lure, aiming to trick users into navigating to potentially harmful sites. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate a phishing or redirection attack.

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.co/app/431946152/hack-conteur-blox-roblox-game-hack In PDF document text
    • http://www.alpaca-buitensport.nl/images/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/console-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/how-to-get-robux-for-free-for-kids_GM431946152.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/coin-master-free-mighty-lion-card_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/how-to-cheat-in-roblox-mega-fun-obby_GM431946152.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/roblox-account-free-with-robux_GM431946152.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/free-level-6-injector-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/how-to-get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/free-spin-coin-master-link-2021_GM406889139.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
font_00_sfnt_off00003065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3065 22664 bytes
SHA-256: dcbb82027820840ba92fedeadfd5279971fd5716ba4330e46ecee9ad9d1e5d2c
font_01_sfnt_off00006311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6311 18712 bytes
SHA-256: 0c4bf91a03a9be4445fac7f2a3d7c2e7451364daf30a1900da5b307af8b46c18

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