Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b9ea7d5a731ed9b…

MALICIOUS

PDF

43.9 KB Created: 2021-06-04 02:34:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cc229990927fe92710e76d360b8bc230 SHA-1: 581c9186861b2e94547bdba284570bac86c2c316 SHA-256: 7b9ea7d5a731ed9bb2e62f1a04b15c9460f3d671ed759a56ede8fd5d6a6da2a4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically disguised as "game hacks" or "free generators" for popular games. The primary URL, https://netcdn.online/app/479516143/minecraft-pe-apk-game-hack, is flagged as malicious. The document body, though heavily obfuscated, contains references to similar lures and URLs, reinforcing the malicious intent. The presence of embedded URLs and the ML classifier's high confidence score indicate a high likelihood of this document being used to distribute malware or facilitate scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/479516143/minecraft-pe-apk-game-hack In PDF document text
    • http://library.stieyapan.ac.id/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-do-you-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/tiktok-free-10-followers_GM835599320.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-for-macbook-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/legit-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-esp_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-gang-rape_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-roblox-credit-for-free_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_004_off00004fe4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FE4 25620 bytes
SHA-256: e442126a5066865ea62d7a3ea2610ced2ac4f41fe3cfe1f48338e546af3105ba
font_01_sfnt_off000089d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89D8 18068 bytes
SHA-256: 5fbed8632119c253af4b9ab7dc246da20067eac7641579129df9e72f6a1f5ea4

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