Malicious PDF — malware analysis report

Static analysis result for SHA-256 516077483b9d3807…

MALICIOUS

PDF

42.5 KB Created: 2021-05-12 13:39:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8291deef279b19715f516c65ef8a494d SHA-1: b9ddfb32328020c370509fbd8de707c891344ff5 SHA-256: 516077483b9d38074dbfe3c797558a946d3cdb04dbb95101ceb9b0c7f61cb440
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and game hacks, directing users to a known malicious redirector infrastructure. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or phishing sites. No scripts were extracted, but the document's structure and embedded links strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/free-robux-on-phone-game-hack In PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-printable-roblox-coloring-pages_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/roblox-executor-free_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-generator-hack_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/robuxfree-con_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-hack-apk-2021-download_GM406889139.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
stream_003_off000049de.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49DE 25736 bytes
SHA-256: 2f97e3586fd7f5cf4bf86315e5885bff063faee92195614e9eb2df72828f741f
font_01_sfnt_off000083fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83FB 18332 bytes
SHA-256: a8c9403bd24fc6ffbb74b72c8864e8746fc5e9ab0f3a7e731dec7195ce2a3638

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