Malicious PDF — malware analysis report

Static analysis result for SHA-256 34b1fe10fdc8f56f…

MALICIOUS

PDF

33.6 KB Created: 2021-07-03 14:34:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9182461353b0f00268ee45fce9fc2a02 SHA-1: 961029e71836bcd61f4f028007aeb00747d370a8 SHA-256: 34b1fe10fdc8f56fea740baa44f7c4bb4c04bb85bca5555feed0dc5e9387db6b
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to websites that promise free in-game currency and hacks for popular games, indicating a scam or phishing attempt. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the presence of many external links classified as a 'PDF_SEO_LINK_FARM' strongly support this conclusion. The document's content and structure suggest it is designed to trick users into visiting malicious sites, likely for credential harvesting or to deliver further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/free-robux-now-game-hack PDF link annotation
    • http://www.eucorro.com/arquivos/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/roblox-free-online-unblocked_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-account-roblox-no-pin_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-admin-2021-roblox-game_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/roblox-como-hackear-la-cuenta-de-tu-amigo_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/how-to-make-a-hacking-game-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/is-minecraft-free-on-computer_GM479516143.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/how-to-hack-an-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/roblox-bubblegum-simulator-cheats_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-free-spins-2021-generator_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-robux-games-that-actually-work-2021_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_off00002e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E6F 21880 bytes
SHA-256: 6d2ccc122b34a4fc5ae7b38784c3cc615d3ead3d28e807468bfc5e091e1fba12
font_01_sfnt_off00005ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED6 18880 bytes
SHA-256: 5812b0d0ccf9dc87c8d54428ef2763728ec286cf096b79da6b6c7cfb1f79e008

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