Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e2ba758e883ec95…

MALICIOUS

PDF

36.8 KB Created: 2021-07-05 16:10:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 87d1634b0dffae6dd951eaca51d85ebd SHA-1: 8621cddcecef229b5e7545158df67e4e83a1775b SHA-256: 4e2ba758e883ec95f7f9359c0d165db95fd7d5d79fa9794d5c63ec86b5e1b5a4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links and a call-to-action phrase, suggesting a phishing or scam attempt. The primary URL, http://netcdn.tw/app/431946152/comment-avoir-pleins-de-money-sur-roblox-en-jailbreak-cheat-game-hack, is likely intended to lead the user to a malicious site. While no scripts were explicitly extracted, the presence of external URIs and the ML classifier's high confidence indicate malicious intent.

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/comment-avoir-pleins-de-money-sur-roblox-en-jailbreak-cheat-game-hack In PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/pokemon-go-for-free-app_GM1094591345.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/skywars-hack-roblox-sword_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/robux-for-free-for-robloxcom-mobile4free24com_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-roblox-password-with-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-audio-hacker-in-the-server_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-free-robux-in-one-clip_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-robux-967k_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-promo-codes-for-roblox-robux2021_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-roblox-intros_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-roblox-codes-murder-mystery-2_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_off00003470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3470 22684 bytes
SHA-256: 60defbe091a947629f9bb2e8fbd290a884c091cbb57bb126239884675790108a
font_01_sfnt_off00006707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6707 20424 bytes
SHA-256: e057e99d39227bf96425c7869f51005bbe2850766ebd026555098cc79a7aa126

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