Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7dfef8e2e5f1e37…

MALICIOUS

PDF

41.6 KB Created: 2021-04-26 12:31:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 13a86df9207f783f8e8012c882d1de60 SHA-1: 2365d857fbedcef288c19378082ddb99fe218b5f SHA-256: d7dfef8e2e5f1e37e11cdc83eadb833e1a300f39791424ed1ba6367f994faeb3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-cheat-bee-swarm-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/free-roblox-bear-mask.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-guns-in-cleveland-rolplay-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-hack-games-on-roblox-rpg-rainbow-swords-rpg.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-hack-robux-with-cheat-engine-67.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-free-money-in-jailbreak.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-websites-for-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-roblox-codes-for-clothes.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/did-tofuu-het-roblox-hacked.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-redwood-prison-hacks.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-pets-on-adopt-me-roblox.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_off00004262.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4262 26740 bytes
SHA-256: ace7ae4278b2bfbe83dfb5086f5a1404b5b8917d2f2fcb73501007d24e744ad0
font_01_sfnt_off00007fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC8 18704 bytes
SHA-256: 80af392ba1d6cfbb2e781905476ec09244cf3fbf864a0f03bc9be5934826c3d5

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