Malicious PDF — malware analysis report

Static analysis result for SHA-256 e78a3359aedafee5…

MALICIOUS

PDF

35.1 KB Created: 2021-06-17 16:47:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c8e5b829680bc62ca38a2f9e896f838b SHA-1: d62289062868d7bf257624657f465e75867a56a0 SHA-256: e78a3359aedafee583c4d6b8cd1ab3894cf2d9c5404a9daa14c89d7a8c2f6af4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a malicious redirector, masquerading as a 'game hack generator' or 'free robux' lure. The primary malicious URL identified is http://netcdn.co/app/431946152/comment-trouver-un-bon-hack-pour-roblox-game-hack. The presence of a download button lure and the ML classifier's high confidence further support the malicious nature of this document. No scripts were extracted, but the document's structure and embedded URLs indicate a phishing or malware distribution attempt.

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/comment-trouver-un-bon-hack-pour-roblox-game-hack In PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/how-to-earn-robux_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/more-robux_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/change-username-for-free-roblox_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/roblox-build-a-boat-for-treasure-free-gold_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/free-robux-today_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/how-to-get-free-cars-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/pokemon-go-free-pokecoins-hack_GM1094591345.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/free-roblox-svg_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_off000031cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31CB 22236 bytes
SHA-256: 1ba8a953c009bc5658721cdc8239138785f8cd4674e9fd37264b1cea7acb85d0
font_01_sfnt_off00006318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6318 19428 bytes
SHA-256: e001ce8ac62189013fb78a7dfecdd6c034dbac397b6ba9548f301053b9917052

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