Malicious PDF — malware analysis report

Static analysis result for SHA-256 79c7fb5171c23cce…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 21:36:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0960edc864755cc7550f14c4e75f83fb SHA-1: 9864201e724b3b8a437f746e7fb05c69044b66b7 SHA-256: 79c7fb5171c23cce2c39001cdd06c97b8453c0f5960ea41fcc2868b9fe1374bf
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/431946152/how-do-you-get-robux-game-hack PDF link annotation
    • http://perpus.i2s-learning.com/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/redeem-roblox-cards-free-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/john-doe-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/item-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-1x1x1x1-hack-crazy_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/robux-hack-tool-apk_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/freerobloxde-hack_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/youtube-inquisitormaster-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-admin-hack-client_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-admin-images-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/minecraft-windows-10-edition-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-hacks-reddit_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/games-that-give-free-robux_GM431946152.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
font_00_sfnt_off0000308b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x308B 22468 bytes
SHA-256: 011c7d2e156fcb65859eead1df3cd29f7fc8270be8cc43d03d2c5672096fad9b
font_01_sfnt_off000062c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C2 19148 bytes
SHA-256: 6aa1a359455049c4d302ae89b0ea3ccbecfe01f67b57fe80c0c8e563803ba4d8

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