Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f619cef393504ce…

MALICIOUS

PDF

43.3 KB Created: 2021-05-16 22:31:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a9ddd329e75f337faa815a0180c2f5c2 SHA-1: df04041a0fbbd0fc6126a40f76a25e0923fb32a3 SHA-256: 9f619cef393504ceec42b1c99894ee081a3d03917beef14f462fb774e60de2de
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors, disguised as "free generator" or "game hack" lures. These links, such as https://netcdn.xyz/app/431946152/free-robux-group-payouts-game-hack, are designed to lead users to potentially harmful websites. The document body and embedded URLs strongly suggest a phishing or scamming attempt, likely aiming to deliver further malware or steal credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/free-robux-group-payouts-game-hack In PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-hack-8-ball-pool_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-roblox-acc_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-hack-android-2021_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/roblox-promo-codes-2021-robux_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/how-to-get-free-faces-on-roblox_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-coins-for-coin-master-blogger_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/roblox-robux-generator_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-spins-coins-coin-master_GM406889139.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_off000048b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48B1 26804 bytes
SHA-256: a542a643b282fd0d4155a92c6b5c3bcac927105f7d8c427815f610566e40f37d
font_01_sfnt_off0000854f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x854F 18856 bytes
SHA-256: ce567b12c15b2d80af346f88522d5e97efe0146d8ef1a381d9680522b282c106

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