Malicious PDF — malware analysis report

Static analysis result for SHA-256 13d2108528fc075e…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 12:43:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 1f9f227c47788d37d728ddbabdf4a96c SHA-1: 659e255a7d345cbb7d9961af8ca3b28bc405cd79 SHA-256: 13d2108528fc075e2ac345c0e9e49031a6f44baba540e6baff997f948fe6a5c7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to 'netcdn.tw', which is flagged as a lure for game hacks. The document body also contains similar lures and references to game-related exploits. This suggests the primary purpose is to redirect users to potentially malicious websites that may host malware or phishing content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/coin-master-spin-hack-game-hack PDF link annotation
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/harked-hack-roblox_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/minecraft-ore-finder-mod_GM479516143.pdfIn PDF document text
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/cheat-engine-63-roblox-codes_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/robuxfree-con_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/wurst-mc_GM479516143.pdfIn PDF document text
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/roblox-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/coin-master-free-fire_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/coin-master-online-hack-2021_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/mc-update_GM479516143.pdfIn PDF document text
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-on-coin-master-iphone_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_off00003448.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3448 22752 bytes
SHA-256: b12d466f9f8752df26c77b791b32ecd8a1d210f008ca22ca096ed9b99d50f866
font_01_sfnt_off00006759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6759 18180 bytes
SHA-256: a132cedd825d849e0d721dfbb1ea0ac908be68f445a4640ebf6ea6c953a82746

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