Malicious PDF — malware analysis report

Static analysis result for SHA-256 f793a834a879b032…

MALICIOUS

PDF

46.4 KB Created: 2021-06-09 12:11:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 49148a919eb90799c504340c9df03c3d SHA-1: ee0d0b73a3a18fec238c4157660941e2d696c5be SHA-256: f793a834a879b032d1985167d44f78c12222d3c29cf3120a35704ca76fe3d58e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as "game hacks" or "free generators". The document body and extracted URLs suggest a lure for free in-game currency or cheats, which is a common phishing tactic. The primary link, https://netcdn.tw/app/431946152/if-bacon-hair-got-free-robux-game-hack, is identified as a malicious redirector, likely leading to further malicious content or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/if-bacon-hair-got-free-robux-game-hack In PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-tiktok-comments_GM835599320.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/freerobux-co_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.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_off000052fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52FA 27640 bytes
SHA-256: 0a43482137c2fc82c86dca90d15c1f961e33029cbeb575afd9e0da734532e54a
font_01_sfnt_off0000926d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x926D 18468 bytes
SHA-256: 2611f5cabef49922ddfa9137ea2f596c0c6f74659243b54333b479571118d3e1

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