Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8f394679d28f1ad…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 05:05:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b6fe719b5c3e36fdf1ea11ad2053b965 SHA-1: ea35a0cf02b1523a5b5b74afd763d22ce6818b96 SHA-256: f8f394679d28f1ad10f6ed1b768484bacb73c547979b385fa143a804d799fed4
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 0.9980

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 http://netcdn.tw/app/431946152/comment-avoir-des-robux-hack-game-hack PDF link annotation
    • https://www.bridalguide.com/sites/default/files/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/how-to-hack-roblox-to-get-robux-on-pc_GM431946152.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/watch-videos-for-robux_GM431946152.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/wurst-112-2_GM479516143.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/roblox-critical-strike-deluxe-hacks_GM431946152.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/free-account-passwords-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/join-this-roblox-group-for-free-robux_GM431946152.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/coin-master-hack-apk-ios_GM406889139.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/hacker-skin-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/roblox-inappropriate-games_GM431946152.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/complete-offers-for-robux_GM431946152.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_off00003036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3036 21272 bytes
SHA-256: b76efc3ecdaa6939916c2fed92de7be07e1d5c7192e816b4ec9e140bd1e12ffb
font_01_sfnt_off00005e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E36 19488 bytes
SHA-256: 16485a3120f883bb204be33c14ccd3ced01f2f69a0171e956386be956a77fdf0

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