Malicious PDF — malware analysis report

Static analysis result for SHA-256 58af3a8064498984…

MALICIOUS

PDF

35.0 KB Created: 2021-07-06 23:02:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 47eabc2a4b8476b04428a1a5916de75f SHA-1: c63ef4c4bf9f4bf78cf3351fa5e93bd593efb4bf SHA-256: 58af3a8064498984659d7a96d67ebc9a624442102a347d1ad5aeb0dbe02f28a0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to free game currency and hacks, directing users to a known malicious redirector. The document body contains multiple URLs, including the primary malicious redirector http://netcdn.tw/app/431946152/how-to-get-free-robux-on-roblox-2021-game-hack, which is flagged by heuristics as malicious. The presence of a download button lure further supports the malicious intent of leading users to potentially harmful content.

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/how-to-get-free-robux-on-roblox-2021-game-hack In PDF document text
    • http://www.sbairs.com/datas/files/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/roblox-app-download-for-free_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/rbx-hut_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/drawings-in-roblox-of-free-draw-2-apha_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/fisticuffs-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-do-i-earn-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/roblox-clothing-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/link-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/codes-for-free-sp-in-ice-cream-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-no-survey-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/is-there-an-actual-hack-that-work-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/lego-hacking-roblox-download_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-hack-unlimited-spins-apk_GM406889139.pdfIn 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_off00003018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3018 22380 bytes
SHA-256: 62308281e3c874eba5e95dfc5f214a3995caedc69d654bcf1eaadbb3b28329b6
font_01_sfnt_off00006234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6234 19460 bytes
SHA-256: a88a3b37d26ae7f28ec6954540056097f0f8d6b678a801dc09bd2df82b34d325

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