Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c6041174ffbdeff…

MALICIOUS

PDF

46.3 KB Created: 2021-06-03 15:59:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: fd188520d31660ca93acfcd1d91b8bb8 SHA-1: 0a04b5d08fb445aec8270f597a72c7d909309949 SHA-256: 7c6041174ffbdeff81cf18a10495967c528131c5111e697640bb348aa62a714d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, one of which is explicitly flagged as a 'game hack' redirector. The document body, though heavily obfuscated, also contains URLs that appear to be part of a lure for game-related cheats or hacks. The ML classifier also flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/legit-coin-master-hack-site-zyngaplayerforumscom-game-hack PDF link annotation
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/download-hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/corn-master_GM406889139.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/pokemon-go-free-download_GM1094591345.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/mathep_GM431946152.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/minecraft-sign-up-free_GM479516143.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/free-robux-apk_GM431946152.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/free-roblox-script-executor_GM431946152.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/minecraft-free-online_GM479516143.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/free-robux-games_GM431946152.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://learning.man3blitar.my.id/__statics/gudangsoal/files/links-to-get-free-coins-in-coin-master_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_off0000532f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x532F 27580 bytes
SHA-256: ddb55fb484643499b2f0cfd0884b06ad936e2a980145a7033e6ee2b45900548a
font_01_sfnt_off00009061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9061 18928 bytes
SHA-256: 2d8f15398b0872070122c1c8280df31c6af84f2aed26de9ea3bfb6d3ad73ce84

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