Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d5e14ff30d0bbfb…

MALICIOUS

PDF

44.4 KB Created: 2021-06-09 15:11:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a3cfdc6c9010e9f407de2b34f7e335d7 SHA-1: b80feca9f62952dd8b2b4fca2bc47c2396c485a0 SHA-256: 7d5e14ff30d0bbfbedbc936596718d04998a1d2adbdf1f7dc4b440411f5def79
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded URLs and a visual download button, strongly suggesting a lure to download external content. The ML classifier also flagged this PDF as malicious with high confidence. The primary URL, https://netcdn.tw/app/431946152/boxland-get-free-robux-game-hack, appears to be the intended destination for the user to obtain the promised 'free Robux'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/boxland-get-free-robux-game-hack.
  • 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/boxland-get-free-robux-game-hack In PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-account-hack-system_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-spin-sites-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-hacks-for-spins_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/strucid-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/get-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/top-best-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/getrobux-come_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_off000051e7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51E7 24432 bytes
SHA-256: 43cfc378ef98538da97eb8d66b03a586a70736cf2cebf02c0e8374e5395fd8b3
font_01_sfnt_off000089ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89AE 18592 bytes
SHA-256: 66b890ea434689a772f530be6237437041d314e4722920f7ba980b91e7fcc6d6

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