Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef0eeb5c3e1e7fa1…

MALICIOUS

PDF

34.7 KB Created: 2021-06-25 05:58:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3d0feccf3600dff6240d4dfb29fae2ca SHA-1: 19ec40206fc61a4fd4cd21009e6379ede5ad26c7 SHA-256: ef0eeb5c3e1e7fa1df26f6ce1dbf3dbcc10aa2d383135f4017bd7132412c97b4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirectors and pages offering free game hacks and currency, such as 'how-to-make-a-shirt-on-roblox-for-free-game-hack'. These links are indicative of a lure to a malicious website, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

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/how-to-make-a-shirt-on-roblox-for-free-game-hack In PDF document text
    • http://pustaka.fk.unand.ac.id/repository/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/hack-roblox-flood-escape-2_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/hack-roblox-pc-prison-life-fr_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/free-robux-admin-panel-twitter_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/how-to-hack-someones-account-on-roblox-vr3million_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/hackaroncom-free-robux-working_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/best-groups-to-join-for-free-robux-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/free-roblox-gift-card-codes-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/roblox-how-to-hack-a-person_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/hack-de-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/how-to-get-2021-robux-free-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/hacks-para-tener-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/roblox-hacked-to-rape-a-7-year-old_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/comment-hack-sur-roblox-strucid_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/free-robux-hack-on-desktop_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/free-codes-in-roblox-arsenal_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/roblox-free-accounts-with-robux-2021_GM431946152.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_off0000308e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x308E 22176 bytes
SHA-256: a048298b1ff8b4425b502700bac129c3b7b1671cdaa4540b7f76a41e7693115d
font_01_sfnt_off00006150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6150 19572 bytes
SHA-256: 34497d3be3ceea924e671c23df6924fb0c31e21c1e4ab5e47028a81f4dba039a

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