Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1630f3c1d94db95…

MALICIOUS

PDF

44.2 KB Created: 2021-06-03 22:07:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c77360d40b9f6777ac354e44189db8fa SHA-1: 4f9c1edbffba63d23b0218501341f9675fbd8aa0 SHA-256: c1630f3c1d94db9511aa7d24c5e1b272407c95c40ccdba6620529ce7caa0412a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks and free currency, directing users to a suspicious URL. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to redirect users to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/roblox-sued-game-hack PDF link annotation
    • http://perpus.wdh.ac.id//repository/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/robux-game-com_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-spin-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-free-reddit_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/robux-today_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-free-pet-food_GM406889139.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_004_off00004f74.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F74 25392 bytes
SHA-256: cca249fc8ac6857ec14ef49ec75b911db445e6303263bdc2c6df25a456e64c2d
font_01_sfnt_off00008ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB9 18100 bytes
SHA-256: ceb05d308fc17805291ab9e53434ca96f69a4d98ec9d0cd75399c721fdce8c16

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