Malicious PDF — malware analysis report

Static analysis result for SHA-256 5921abe003482a56…

MALICIOUS

PDF

32.9 KB Created: 2021-07-06 07:23:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e12a3c46faa5c8b49399918ea0e3a415 SHA-1: 6a04a9c5b63a68ef18ac7cbaed65c1a65b8893cf SHA-256: 5921abe003482a561713c449c5f61c83c64ba0145135b7c3e48c3fea832150c6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and lures users with promises of 'free generators' or 'game hacks'. The primary link, http://netcdn.tw/app/431946152/100-robux-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious intent to redirect users to potentially harmful content, likely for phishing or malware distribution.

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/431946152/100-robux-game-hack In PDF document text
    • http://smpn1sda.sch.id/slims/repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free4mobile24-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/robux-card-hack_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/are-robux-hacks-real_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-instagram-free-spins_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-get-1m-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/hack-kick-off-roblox_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-rs-cheat-2021_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/hacks-for-roblox-jailbreak-noclip-18_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/buy-robux-for-free-pastebin_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/robux-hacks-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/download-hack-in-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CB1 21596 bytes
SHA-256: ef2627a76120cb72b7c403e7fb5e9c73cdfafbbcb93435076f6f1b0cf19df2da
font_01_sfnt_off00005bbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BBE 18828 bytes
SHA-256: 119893438dfdee07160b20114d595d80c7b0a9a0af49c5fc1e20f3c535fc2fc3

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