Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1b7828a87020c8e…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 18:44:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 732d2515b8914b3721fe58080bbf08e1 SHA-1: d3eab28d25923d7a39306bc1fc1aec9c955cb16c SHA-256: e1b7828a87020c8ee7574d063f2580719ef753da25f158ebf8144f364526b7ed
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/get-free-robux-com-game-hack PDF link annotation
    • http://library.stembi.ac.id/repository/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-robux-inmages_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-avatar-free-download_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/god-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/hack-para-shinobi-life-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-alts-roblox_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-mad-paintball-2-free_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-roblox-pin-generator_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/blackberry-roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-look-like-chara-from-undertale-in-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-fog-remove-hack_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/hack-apk-roblox_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/apocalypse-rising-hacks-roblox-crash_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/admin-script-for-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-admin-panel-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/jp-youtube-roblox-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/easy-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-sharkbite-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-geht-free-robux-no-human_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_off00002f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F16 22408 bytes
SHA-256: ce497bb4c7542aed258f9c28c99601e87d324604237ea85b34183fc78ff00f2b
font_01_sfnt_off000060ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60ED 19080 bytes
SHA-256: bd48df5b3587c62f460ac4547970d78652d76b982da8f06603591dccd4bca80f

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