Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8d88991aa22316a…

MALICIOUS

PDF

43.5 KB Created: 2021-05-14 07:37:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fd8799415b6d12fa091ae8cbbf7db978 SHA-1: 1461e52d6773c2e7fe9d2a3af745689340882364 SHA-256: d8d88991aa22316acabdf674704607e57f8bd1fdce075b93b11488eec1f5c255
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games. The primary lure URL is https://netcdn.xyz/app/431946152/get-free-robux-without-human-verification-game-hack, which is flagged as a malicious redirector. The document body, though partially corrupted, contains text related to 'free Robux' and the malicious URL, reinforcing the social engineering lure. No scripts were extracted, but the presence of multiple malicious links indicates a phishing or scam attempt.

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/get-free-robux-without-human-verification-game-hack In PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/unlimited-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/clean-master-coins-hack_GM406889139.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/coin-master-20-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/coin-master-real-free-spins_GM406889139.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/coin-master-hack-apk-download-latest-version_GM406889139.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/coin-master-free-pet-food_GM406889139.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/roblox-tix-generator_GM431946152.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/roblox-a_GM431946152.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/coin-master-firebird-card-free_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_off00004bd4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BD4 25712 bytes
SHA-256: 2cc79c689584a803e10b7269487bfa676bf8db2477925904c6569dae0dd21b23
font_01_sfnt_off000084ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84FF 19224 bytes
SHA-256: d26e558c8d9f3aa3a60cf99b5f2b698b808b007009279a89da7a3b2992804aa3

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