Malicious PDF — malware analysis report

Static analysis result for SHA-256 54448d009d93f95b…

MALICIOUS

PDF

42.1 KB Created: 2021-05-12 05:07:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3a814800cbba3ebfd31f932d729e6385 SHA-1: abf0321b9eaafe2937e9e0946c33f928e7db6c43 SHA-256: 54448d009d93f95b1ea44e298f7bddb4a9fecde39629dccd712d49a8fb158e6b
142 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. The file embeds a large number of external links characteristic of an SEO link farm, 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

  • 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 https://netcdn.xyz/app/406889139/coin-master-free-spins-link-2021-download-game-hack PDF link annotation
    • http://livsgnistans.se/images/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://livsgnistans.se/images/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • http://livsgnistans.se/images/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://livsgnistans.se/images/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://livsgnistans.se/images/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • http://livsgnistans.se/images/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://livsgnistans.se/images/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://livsgnistans.se/images/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • http://livsgnistans.se/images/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://livsgnistans.se/images/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://livsgnistans.se/images/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://livsgnistans.se/images/free-minecraft-account-list_GM479516143.pdfIn PDF document text
    • http://livsgnistans.se/images/make-robux_GM431946152.pdfIn PDF document text
    • http://livsgnistans.se/images/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://livsgnistans.se/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://livsgnistans.se/images/free-coins-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://livsgnistans.se/images/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://livsgnistans.se/images/stock-speed-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://livsgnistans.se/images/how-to-get-free-coins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://livsgnistans.se/images/coin-master-free-spins-link_GM406889139.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_off0000473f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x473F 24988 bytes
SHA-256: 615194e76f5640b1f0e3aa444f768b81b5c769c2053600fe22d8a4e298d6ce49
font_01_sfnt_off00007fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FEE 19036 bytes
SHA-256: e0f8480fa6793c91ec869da5acb64ee4c254eeaf21d467085c584c7dc5eb632a

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