Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b9c3931a26a44d9…

MALICIOUS

PDF

34.9 KB Created: 2021-06-27 04:37:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6a03df35fd1fe09f1289969ed3704e58 SHA-1: 553b07ce188468b1d4877404f14314fc7b5fcd8e SHA-256: 0b9c3931a26a44d91959addc9286e90b643267a5f2bebaab0450d3b0533dab27
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting 'free Robux' and game hacks. The document body and heuristics indicate a lure designed to trick users into visiting these malicious sites. No scripts were extracted, but the presence of multiple malicious redirector links suggests a phishing or scam 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/free-robux-phish-game-hack In PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/www-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/infinite-robux_GM431946152.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/roblox-skins-free-hack_GM431946152.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/hot-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 4

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_off000031e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31E5 22164 bytes
SHA-256: baf28600a3c43dff9f1aa34af71ce39538cd58b0e7bde0aa26d5b44a53603c77
font_01_sfnt_off00006325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6325 19156 bytes
SHA-256: 01d365788e4b00393420e6033b819926ef25bf132cf46abe9dea3e2049a89b9a

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