Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68e471561f3b024…

MALICIOUS

PDF

45.4 KB Created: 2021-06-09 09:32:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f828323e6e8f4db6df0b57cb69fb5b5a SHA-1: dca20fe2c7b29aa6a4455d6dd58ab09514cdb368 SHA-256: b68e471561f3b0240d2aaab74d02108c351bae245302c70ab6c17854064665f1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to a malicious redirector disguised as a game hack generator. The document body and extracted URLs reinforce this, indicating a lure to download further content. While no scripts were directly extracted, the PDF structure and malicious links suggest an attempt to trick the user into downloading and executing a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/robux-free-credit-game-hack In PDF document text
    • http://vagency.us/images/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://vagency.us/images/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://vagency.us/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/coin-master-free-spins-today-new_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/how-to-stop-roblox-from-closing-when-hacking-with-dlls_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/free-roblox-money-codes-2021_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://vagency.us/images/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/roblox-robux-generator-tool-2021-robux-hack-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_004_off00004ff1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FF1 29528 bytes
SHA-256: e585f7cde2b2e77fdaaecbe4f29c1eaa16ddeb70c3a92f1e4e586dc23e12a99f
font_01_sfnt_off00008eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EBA 18412 bytes
SHA-256: f5a68ea9db5d8a9effac213a61da400962ed4b0dd7c545d5bee9d294dbd2bcdf

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