Malicious PDF — malware analysis report

Static analysis result for SHA-256 89db32145e8ef338…

MALICIOUS

PDF

48.2 KB Created: 2021-06-10 22:12:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9017728490277ab1cf415d39a9e30b88 SHA-1: 743eb9741c069306adf8dd93a164533dc5754138 SHA-256: 89db32145e8ef33870c97232a9247527715e1576e49559437e1372f7593efb2a
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a lure impersonating Microsoft, directing users to a malicious URL that promises free game items. This URL is identified as a known malicious redirector, indicating a credential phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/free-superhero-skin-roblox-game-hack.
  • 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.tw/app/431946152/free-superhero-skin-roblox-game-hack In PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/descargar-roblox-hack-2391_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-robux-obby_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/minecraft-java-free-account_GM479516143.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/microsoft-rewards-robux_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-roblox-clothes-temp_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-roebucks-no-human-verification_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-robux-earner_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51D4 25068 bytes
SHA-256: b73f914c51f0faf648aee711ca897d18863569463074c96c058ccb392a59f7bd
font_01_sfnt_off00008bcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BCD 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00009875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9875 18720 bytes
SHA-256: 725740061d1bd78b416b729477066088427af6d59edfa31ba279084e01ea353e

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