Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ef065a16299da5b…

MALICIOUS

PDF

51.8 KB Created: 2021-05-16 22:04:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 967cf7d3fc7b60a1227f97dda5f5c8e2 SHA-1: e384472b045bcadcd8916c01c6d45938ed9b9ca3 SHA-256: 9ef065a16299da5b98b8d7f2ed87eedb3388094c63a764f3b26c9e70d77ccff4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links, specifically luring users with 'free generator / game hack' content. The embedded URL leads to a known malicious redirector infrastructure. The document body, though partially garbled, contains text related to 'Robux Generator' and the malicious URL, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9348

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/robux-generator-without-human-verification-game-hack In PDF document text
    • https://bancroftandsons.com/images/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/coin-master-home_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/coin-master-hack-no-verification-ios_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/free-spin-coin_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/how-to-make-robux_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • https://bancroftandsons.com/images/roblox-install-free_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/get-robux-today_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/how-to-get-coin-master-free-spins-in-email_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/cm-spin-link_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • https://bancroftandsons.com/images/robux-games_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cd1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CD1 26676 bytes
SHA-256: 23ec85cff55d3e90dbcdb9515cbb4cf44b485af5a4943ff0d48ff3cce0568dc4
font_01_sfnt_off00008aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA0 8528 bytes
SHA-256: 2044b59a66052fec1a685dfc67b658a321e8f12b2ab4f01aa2ebbfb62317ea04
font_02_sfnt_off0000a617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA617 19060 bytes
SHA-256: 0b726b9d6aa2dbbe5db30d67cab0ffdd1f5741338f472823ef6d39bdf2cbc11d

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