Malicious PDF — malware analysis report

Static analysis result for SHA-256 288d099b4bd21817…

MALICIOUS

PDF

43.4 KB Created: 2021-05-14 12:04:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 42bf03fad705e18c8509585bdaac28ac SHA-1: 9dda0282b42b1b81027533f1fe0383227569a0c2 SHA-256: 288d099b4bd2181705accc5b76f1e00991b90224fa41633af41b198a3a699020
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains numerous links to websites offering game hacks and free in-game currency, such as 'free robux' and 'coin master hacks'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm designed to attract users through deceptive content. The ML classifier also flagged this PDF as malicious with high confidence. The primary attack pattern involves luring users to potentially malicious sites via these deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/free-robux-thumbnail-game-hack PDF link annotation
    • http://federcaccianucleomagenta.it/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://federcaccianucleomagenta.it/images/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://federcaccianucleomagenta.it/images/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • http://federcaccianucleomagenta.it/images/coin-master-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://federcaccianucleomagenta.it/images/how-to-get-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://federcaccianucleomagenta.it/images/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://federcaccianucleomagenta.it/images/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://federcaccianucleomagenta.it/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://federcaccianucleomagenta.it/images/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://federcaccianucleomagenta.it/images/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://federcaccianucleomagenta.it/images/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://federcaccianucleomagenta.it/images/roblox-free-models_GM431946152.pdfIn PDF document text
    • http://federcaccianucleomagenta.it/images/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://federcaccianucleomagenta.it/images/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://federcaccianucleomagenta.it/images/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • http://federcaccianucleomagenta.it/images/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://federcaccianucleomagenta.it/images/get-robux-now_GM431946152.pdfIn PDF document text
    • http://federcaccianucleomagenta.it/images/hack-coin-master-apk-31_GM406889139.pdfIn PDF document text
    • http://federcaccianucleomagenta.it/images/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://federcaccianucleomagenta.it/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B95 25160 bytes
SHA-256: 0b9d46565ec15292c9f062826be2e31d6f8fde7dce4a80937f761b8ec1645340
font_01_sfnt_off00008603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8603 18864 bytes
SHA-256: c969eb26f29950990ddccbf0eeab0a7af3119d1c9c7ebc0fee97903357bc58cd

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