Malicious PDF — malware analysis report

Static analysis result for SHA-256 216b747ab99aca24…

MALICIOUS

PDF

35.1 KB Created: 2021-07-04 11:59:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e5cf2be3452b4f0bec0a7cfd74802882 SHA-1: 11f4ca9003adff59e4acc6ffdaa50e5865689bee SHA-256: 216b747ab99aca24d01f69c8bfe6fba6e638537b17a6aa0086531d36daa7c23c
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 0.9980

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 http://netcdn.tw/app/406889139/todays-free-spin-and-coin-links-game-hack PDF link annotation
    • http://digilib.unla.ac.id/repository/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-jailbreak-hack-noclip-zip-file-download_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/pubg-uc-png_GM1330123889.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-candy-audio-roblox-id_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-shirt-roblox-adidas_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/robux-online_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-windows-10-code-free_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-esp-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/mosttechs-coin-master-free-spins_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_002_off0000302d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x302D 23528 bytes
SHA-256: 6df198e22d545158d91adefe5761712aa9a5a2325094b17ab1012d14bd277027
font_01_sfnt_off0000658b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x658B 18596 bytes
SHA-256: d9f470f219aa93d1dfbcbe5b6653e5cda51e656abd72020ea50403cd11ee82f4

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