Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5b7566c5fe72f37…

MALICIOUS

PDF

35.0 KB Created: 2021-06-20 01:11:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b39eadcdab1557ba04355a1aef21414d SHA-1: 30c41c0024716befa7ca27c4984ea4a164becc51 SHA-256: e5b7566c5fe72f37f52a51c4376343ccbeed5d0c1ecd68087c6ac659554ad2ae
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting "game hacks" and "robux generators". The primary lure URL is http://netcdn.co/app/431946152/robux-gift-card-hack-code-game-hack, which is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to trick users into visiting malicious sites, likely for credential harvesting or further malware delivery.

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.co/app/431946152/robux-gift-card-hack-code-game-hack In PDF document text
    • http://library.stembi.ac.id/repository/how-to-get-1-million-robux-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-robux-code-generator-2021_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-mobile-hack-apk_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/hacked-pokemon-brick-bronze-roblox_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-escape-the-labyrinth-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-animation-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-cheat-engine-detection_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-hack-robux-no-download-no-pub_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-best-hack-for-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-how-to-be-builders-club-for-free_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/wix-site-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-fly-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/boku-no-roblox-remastered-hack-script_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-typing-cheat-to-get-money-on-blox-burg_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/robux-hack-2021_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_002_off000030e5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30E5 22524 bytes
SHA-256: a87459bb8a0f9fa229572046df557546ad998e9329fbfda2343d068d7ac8cdaa
font_01_sfnt_off0000634c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634C 19120 bytes
SHA-256: b039c6725cb5ecd2c82144304fcd1ee6a2c9778fb6a6430ed096793bfc400f54

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