Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b831d32c32b4409…

MALICIOUS

PDF

41.9 KB Created: 2021-05-12 17:39:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: c5c963b909952822a820b046ba86caf2 SHA-1: a515ebbda3938cdae78dce3f4575a090db487c18 SHA-256: 7b831d32c32b44097758ce76c547d21d9ff6f7424e91b4e985a687c58e0a3b38
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'game hacks' and 'free rewards' to trick users into clicking embedded links. The primary link redirects to a URL associated with game cheats, and other links point to IP addresses hosting similar content, suggesting a phishing or scam campaign. The ML classifier strongly indicates malicious intent.

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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-rewards-link-game-hack PDF link annotation
    • http://36.94.36.7/elib//repository/best-free-minecraft-skins_GM479516143.pdfPDF link annotation
    • http://36.94.36.7/elib//repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/coin-master-20-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/free-robux-live_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/win-free-robux_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/roblox-person_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/hack-minecraft_GM479516143.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_off000048de.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48DE 24900 bytes
SHA-256: c76e6e7eb4da2dc49becd5d66afa318f8a5f268391596ca170b61fe685ae3fd2
font_01_sfnt_off00008190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8190 18216 bytes
SHA-256: 658cfe6ea68dc33f1c61864f727cf80d605750a91b73f2c3ad1e1c3c3fde56a2

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