Malicious PDF — malware analysis report

Static analysis result for SHA-256 f337e5eaa10153bc…

MALICIOUS

PDF

42.9 KB Created: 2021-05-11 17:05:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e98aaa9f4c36d04c14580795b2981933 SHA-1: 2aedde6ff7c2957d975138c42e7dd555fece576f SHA-256: f337e5eaa10153bc4bf81577a01e7ffb07f10829bdb26c94f1d4659587ebd122
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 0.9971

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.xyz/app/406889139/how-to-get-free-shields-on-coin-master-game-hack PDF link annotation
    • https://ourlady-elearning.com/userfiles/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/legit-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/apk-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/monttechscom-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/minecraft-sign-up-free_GM479516143.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-mod-apk-2021_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/minecraft-hacks-for-2b2t_GM479516143.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/roblox-website-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
stream_003_off00004c86.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C86 24996 bytes
SHA-256: f736ed1ebf899c71072f98b90f85a5b6093b8fa7bfeae0576d2f50ad98da1074
font_01_sfnt_off00008584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8584 18288 bytes
SHA-256: 9f23db5f7e4aea9ade489dbfee04f76c59a98f319c99e466b9c1fecfdfb20686

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