Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ca2d06e2a90d03d…

MALICIOUS

PDF

42.8 KB Created: 2021-05-19 21:05:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: aa8785af2f2569cdffdc32951925001a SHA-1: 6b93ffc491eec8c39ca33e96c1688906cb94c904 SHA-256: 6ca2d06e2a90d03de9aa2c7b75874a43ddb1345276b3be7b9c1444fb713231be
122 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. 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 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/479516143/mine-minecraft-games-for-free-game-hack PDF link annotation
    • http://bufbd.org/images/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
    • http://bufbd.org/images/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/coin-master-apk-hack-2021_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/static-moonactive-net-free-spins_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/ww-robux_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/roblox-images_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://www.youtIn PDF document text
    • https://code.giftcards.comIn 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_off00004c77.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C77 25516 bytes
SHA-256: d6b388ec231bc7d715fc51bd8087b2ce913e47c452f732b1ebc60208442ef4c5
font_01_sfnt_off00008642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8642 17968 bytes
SHA-256: cadb606d3d0b8b0ab684217e51fa9c6d47dd4cc69c3dac55631094b48cac1516

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