Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a510016ed4fa5bb…

MALICIOUS

PDF

45.5 KB Created: 2021-06-11 10:00:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 31ac944519b09281cee1a8f1a1864b5e SHA-1: 2c2857feb43bd7cf559db396c4117e374248474b SHA-256: 7a510016ed4fa5bb46c21ec87f89dd9f35bb60d81889d3571fe303a8013b9beb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to websites offering 'free generators' or 'game hacks', a common lure for phishing or malware distribution. The primary redirector URL is identified as malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious redirector workflow designed to lead users to potentially harmful content.

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/free-robux-actually-works-no-scam-game-hack In PDF document text
    • https://gimnaziya6.kz/images/100-robux_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/free-robux-no-prank_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/roblox-robux-pastebin-hack-2021_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/coin-master-hack-that-actually-works_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/roblox-free-executor_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/coin-master-website_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://gimnaziya6.kz/images/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/freespinandcoin-blogspot-com_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/free-tiktok-like_GM835599320.pdfIn PDF document text
    • https://gimnaziya6.kz/images/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • https://gimnaziya6.kz/images/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • https://rblx.landIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f38.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F38 27260 bytes
SHA-256: 3abc4a5bc09e2820ce4695cce3356b74a00283aecec4fc9e1cdb3ca5db6275a1
font_01_sfnt_off00008c86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C86 19228 bytes
SHA-256: 3a2673b3306920b1fee8b35ddef36cc2982e74bf47ba381672d8e65fbca5c0cb

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