Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9e6c30fc637d947…

MALICIOUS

PDF

44.3 KB Created: 2021-05-20 01:03:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ba43e6ea540588ddcb49ff0aac7af572 SHA-1: 2f5c434aa9030d6957fec97b0678d49ec5b29e9c SHA-256: f9e6c30fc637d947795403e37ee7d1ee4656ca72a73370d68d3cf58ea3cdb3c3
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs a lure related to 'Coin Master Free Spins' to deceive users. It contains multiple embedded URLs, including one pointing to a 'game hack' redirector. The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document attempts to solicit sensitive information such as recovery phrases or private keys, which is a common tactic in credential harvesting or phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/coin-master-free-spins-link-today-new-2021-game-hack PDF link annotation
    • http://collectionsuncovered.com/media/storage/editor/files/coin-master-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/coin-master-free-spin-now_GM406889139.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/mcpe-hacks_GM479516143.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/roblox-cp_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/free-robux-link_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/roblox-free-items_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/pokemon-go-no-free-remote-raid-pass_GM1094591345.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/free-roblox-clothes-and-hair_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_off00004a7d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A7D 30228 bytes
SHA-256: 68262c939ae44901ddd2877030a0855db169f20ae6c3be08a2a95a1c9d6e6400
font_01_sfnt_off00008876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8876 18976 bytes
SHA-256: 9ab4b87832590d82aec569b9c8693c2016d5d9151569e528de1ed13ad8a1cb2c

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