Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a87c40deb2136c8…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 07:02:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2ebaf3bfb26c7630cfa953ab8a4c09c9 SHA-1: e00105cef525348037421ceceeb6accd65e449f2 SHA-256: 9a87c40deb2136c8c96f9496145cea7736b39e5dcaae85659c4a323dc3b56c22
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a redirector hosted on 'netcdn.tw' which is flagged as malicious and associated with game hack lures. The document body and embedded URLs reinforce this theme, suggesting a phishing or scam attempt to trick users into visiting malicious sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/479516143/minecraft-game-hack In PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/robux-giver_GM431946152.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/minecraft-education-free_GM479516143.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/robloxcatalog-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/robux-free-online_GM431946152.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/robux-redeem-card-hack_GM431946152.pdfIn PDF document text
    • http://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/free-tiktok-likes-no-survey_GM835599320.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-today_GM406889139.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/https-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/robux-free-c_GM431946152.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/roblox-xbox-one-free-download_GM431946152.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/daily-coin-master-free_GM406889139.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.manurulkhoir.sch.id/__statics/gudangsoal/files/how-to-get-any-item-in-roblox-for-free-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_off0000320c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x320C 22184 bytes
SHA-256: be873877f1aa8519b8bb842369cf21eba271d9b4c0c0baf3536e81bef89d04c5
font_01_sfnt_off0000630c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x630C 17856 bytes
SHA-256: 18153eb78e52d10f573a403757bf08b8b042ff0dae7dd3b4cc440df27f37a65e

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