Malicious PDF — malware analysis report

Static analysis result for SHA-256 988ead9822cbdf8c…

MALICIOUS

PDF

40.1 KB Created: 2021-04-25 13:29:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 40af5eff715859be5a72bcba73e5772f SHA-1: acd2e5cff2b5542b9730bbc46e114fb37a81fa1b SHA-256: 988ead9822cbdf8cae3a9f297400c435678b36eb170cecee06e5ccc7697013e6
200 Risk Score

Malware Insights

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

The PDF contains multiple links to external websites, including a known malicious redirector, disguised as game hacks and generators for Roblox. It also impersonates Amazon, suggesting a credential phishing attempt. The embedded links likely lead to further malicious content or exploit delivery, indicating a multi-stage attack. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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.xyz/app/431946152/roblox-royalty-free-music-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.xyz/app/431946152/roblox-royalty-free-music-game-hack In PDF document text
    • https://lib.stie-yai.ac.id/repository/numeros-de-roblox-hacker.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-roblox-redeem-cards-codes.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/hacking-brothers-roblox-account.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-get-a-white-shirt-roblox-free.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/get-free-robux-today.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/bleu-roblox-hack-key.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-hack-bee-swarm-simulator-2021-download.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-sword-that-work-in-roblox-games.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-rare-name-generator-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/cool-exploits-for-roblox-totaly-safe-and-free.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
stream_003_off00004065.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4065 24672 bytes
SHA-256: b5c8b61e9ecebcbb1b2ce1c09fb3f057ed5c1a4588ac126738a3d2e32a3c5b3c
font_01_sfnt_off00007930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7930 18916 bytes
SHA-256: 2b9b62a1be9c378bd5ee0ddd1d0d6f663ea4b2d6e37e397d93dc576825e3610b

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