Malicious PDF — malware analysis report

Static analysis result for SHA-256 aed4dbad758016dc…

MALICIOUS

PDF

42.5 KB Created: 2021-05-13 11:03:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a07f18715a635c00992c1a1219833b4b SHA-1: 9f98701903c31ec768979feb5dd32670db1c9a51 SHA-256: aed4dbad758016dc7a56583ff99b823a6e463528cb8476e3d23724ace4e77fea
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains a lure for free Robux, directing users to external URLs that are likely part of a phishing or malware distribution scheme. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports a malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/how-do-you-get-free-robux-without-doing-anything-game-hack In PDF document text
    • http://rightlead.com.tw/image/data/files/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/is-coin-master-hacks-safe_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/coin-master-hack-ios-no-verification_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/free-robux-link_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/getrobux-ninja_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/wurst-112-2_GM479516143.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/coin-master-map_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn 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_003_off00004966.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4966 23964 bytes
SHA-256: ea70c272bd25ed7c6bc36f7682cecd2546eb0665d74537dfbdc8570dae260c19
font_01_sfnt_off00007fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FFF 19564 bytes
SHA-256: f288fbb1ab92d6f8be6652009a81e99b9e02fb437604b8cefd24a0b2528ef73f

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