Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa3af9cdc0dfd388…

MALICIOUS

PDF

41.2 KB Created: 2021-05-15 11:41:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 38c63c22291a397f03f395060298c761 SHA-1: caf11f8f180e85ce1edda64a6e566dedf85258b7 SHA-256: fa3af9cdc0dfd38882cfcac4e58da136b8636839364131e23ab7500c45b3704b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 4

  • 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/corn-master-game-hack PDF link annotation
    • http://britishcomics.com/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://britishcomics.com/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://britishcomics.com/images/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
    • http://britishcomics.com/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://britishcomics.com/images/mcpe-com_GM479516143.pdfIn PDF document text
    • http://britishcomics.com/images/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdfIn PDF document text
    • http://britishcomics.com/images/moonactive-free-spins-link_GM406889139.pdfIn PDF document text
    • http://britishcomics.com/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://britishcomics.com/images/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • http://britishcomics.com/images/coin-master-free-mighty-lion-card_GM406889139.pdfIn PDF document text
    • http://britishcomics.com/images/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://britishcomics.com/images/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
    • http://britishcomics.com/images/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://britishcomics.com/images/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • http://britishcomics.com/images/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://britishcomics.com/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://britishcomics.com/images/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • http://britishcomics.com/images/free-apk-mod-coin-master_GM406889139.pdfIn PDF document text
    • http://britishcomics.com/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://britishcomics.com/images/free-minecraft-skins-xbox-one_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
font_00_sfnt_off00004a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A5D 24420 bytes
SHA-256: f64204751e137dbd93e448e7b361e5cf393920a3723411fe8d8cf868f3a11e3d
font_01_sfnt_off00008140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8140 17428 bytes
SHA-256: bb7ddfb5eeb119ecc025e94c1b8f2696886702df12a5472958d742496d82a376

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