Malicious PDF — malware analysis report

Static analysis result for SHA-256 445059ca5c6b3bdd…

MALICIOUS

PDF

33.4 KB Created: 2021-06-25 10:21:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-12
MD5: 5c24863233b76efc8626ec8113932a80 SHA-1: b8b7c2524e82782e8c4de1e235a5fe0f77346f2f SHA-256: 445059ca5c6b3bddcfdc6a73046e01e6582ff84f8637465d964a73518a7be948
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a malformed exploit stream and links to known malicious redirector infrastructure, specifically promoting 'free Robux' or 'game hack' lures. The document body and embedded URLs strongly suggest a social engineering tactic to trick users into visiting malicious sites that likely host further malware or phishing content. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9852

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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/free-robux-glitch-2021-september-game-hack In PDF document text
    • http://library.asih-husada.ac.id/repository/robux-fre-codes_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-hack-2021-sec_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-robux-hack-no-survey-no-password-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/youtube-how-to-hack-into-builders-club-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-coin-master-coins-and-spins_GM406889139.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_off00002a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A71 21984 bytes
SHA-256: 0237486b7265bd89325559001629e236ef69e4559bbf1f757fbf79158b38f704
font_01_sfnt_off00005b09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B09 20016 bytes
SHA-256: 5b682bee47618f7f0e0fe43a740ef43c6ccbc4bb6a19bcf720fbfd114ef33b6f

Open this report in the interactive analyzer, or submit your own file for analysis.