Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a91da22f22967dd…

MALICIOUS

PDF

45.2 KB Created: 2021-06-03 07:42:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 95e9af230c28ed5934e586b5e42815f9 SHA-1: 121fdc595cf493c6a0cc384b9925ec92e09d2f34 SHA-256: 9a91da22f22967dda96564a95e5f34335ee999ce0586d71cb0f65b71621df4e6
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 0.9804

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/406889139/coin-master-bonus-game-hack PDF link annotation
    • http://perpus.wdh.ac.id/repository/roblox-sued_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-hack-extension_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-college-textbooks-tiktok_GM835599320.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004cbc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CBC 24848 bytes
SHA-256: 7bd3eee24080520fb9171ad9bf8aca823d3de91fe653cf743c03f5b84f1577e4
font_01_sfnt_off00008539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8539 2824 bytes
SHA-256: a0d6c1ef1f7405ab05245801e4abbc2877925f97898db53811df9ab010e978fa
font_02_sfnt_off00008ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED7 17900 bytes
SHA-256: d4cb4f8b582e53d36decfc4acea5f7bd3ab490a7e6a584b333508c86d745803e

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