Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b2444adadee3862…

MALICIOUS

PDF

35.0 KB Created: 2021-07-21 07:48:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 92fbaa3b4a80a97b0cc247ad2c3e7ed7 SHA-1: 8f5e1e8ef7a19c9c596d2d359519472995ff083e SHA-256: 0b2444adadee38629f72bb07cb75b54234d72f91214f63954df0dd164cf0fc66
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one to a known malicious redirector at http://netcdn.tw/app/431946152/free-robux-pastebin-game-hack. The document body and heuristics indicate a lure for 'free Robux' or game hacks, suggesting a phishing or scam attempt. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

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/free-robux-pastebin-game-hack In PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/how-to-get-free-tiktok-fans-without-human-verification_GM835599320.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off000033f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33F2 22328 bytes
SHA-256: 2321ba4762729b1c3444715f79eaa5eec9bf9a3afa4a445fd76a77b5d376f175
font_01_sfnt_off00006570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6570 18808 bytes
SHA-256: c7d6beabc6e4b759c7dbfcacacb004f3555d716d97c76aeda79e2e0055e00581