Malicious PDF — malware analysis report

Static analysis result for SHA-256 111a4f1b3bd51275…

MALICIOUS

PDF

33.2 KB Created: 2021-07-04 13:21:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ced97f9a5a47c293a735f022c06128df SHA-1: d1a8cdb1e0f598b51ab35947ccaf21c10c095c94 SHA-256: 111a4f1b3bd51275a0bf0458566a209d00df4e98302829be99a2bfc6671e3aac
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/hacks-to-get-free-robux-game-hack PDF link annotation
    • http://lc.pustaka.unand.ac.id/repository/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-roblox-injector_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/cpbildco-robux_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/robux-free-inspect_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/coin-master-get-free-cards_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-tickets-roblox_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/roblox-fun-com-robux_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/how-to-get-gear-in-roblox-free-admin_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/codes-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/coin-master-free-coins-link-2021-deutsch_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
font_00_sfnt_off00002de0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE0 21424 bytes
SHA-256: 382c39560f425f8c20b9a314a04cd84511d0db42857ceb2dd2a5ee4648ee39f9
font_01_sfnt_off00005cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC7 18992 bytes
SHA-256: a46b776bb67c7b468de6bb210db8cc3c07a9aad6d9a2155761eaac94cf23c7ac

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