Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e7cda58b3c856ea…

MALICIOUS

PDF

33.6 KB Created: 2021-07-04 11:55:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: aee07bba2b298e11b31c81c1eedd28e7 SHA-1: 860f314c95cbafa1fa0b75c3c758e4f3dd782723 SHA-256: 7e7cda58b3c856ea2cb5b508d9b268f08fed2041e93b38c8d175a6eaa35371d1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a call-to-action phrase, strongly suggesting a phishing or scam attempt. The ML classifier also flagged this PDF as malicious with high confidence. The primary URL, http://netcdn.tw/app/431946152/how-to-get-free-robux-gift-cards-game-hack, is likely the destination for the lure, aiming to trick users into believing they can get free virtual currency.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/how-to-get-free-robux-gift-cards-game-hack In PDF document text
    • https://opac.umrah.ac.id/repository/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-cheat-engine-2021-download_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/where-to-find-roblox-speed-hacks_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/every-free-item-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/sites-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/body-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/easyrobux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-wall-hack-in-roblox-after-patch_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-have-the-gamepass-for-pet-simulator-roblox-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-items-in-roblox-games_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-prison-life-hack-download_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-free-followers_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/december-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-hacks-on-roblox_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
font_00_sfnt_off00002eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB9 21360 bytes
SHA-256: 805b5affe78e58bcb080c5c15d6042fb4d38ff1099d7c8d23f5505c9d6d8a935
font_01_sfnt_off00005d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D32 19280 bytes
SHA-256: fafb4ed9e61e21bf70d6f5220cfbe000d8fd05b6b22885af89428efc19440718

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