Malicious PDF — malware analysis report

Static analysis result for SHA-256 de4fc10b3a89bcc6…

MALICIOUS

PDF

48.0 KB Created: 2021-06-10 16:18:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a1b136e01d4a294b553482fdef1bf12e SHA-1: df7ea373cb2c77bb2bd9813474b8c8640100aa5e SHA-256: de4fc10b3a89bcc64642100889f4eee052bf925af2207e8cd7fe031dd58192ea
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 0.9796

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.tw/app/431946152/free-gsg9-roblox-group-game-hack PDF link annotation
    • https://digilib.stieama.ac.id/repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-but_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-gratis_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/group-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/rbx-claim_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-roblox-scratch_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-weird_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/hack-roblox-players_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-twitter_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000509f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x509F 26256 bytes
SHA-256: 2f7ad31057ed76e64190efd65e64eeb029b0e540b3ce5b734f5757de1f73f885
font_01_sfnt_off00008da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA0 2872 bytes
SHA-256: 92048147402c96588c4b5b10631c954292112235277e057a7b782c864c1b3076
font_02_sfnt_off0000978f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x978F 18716 bytes
SHA-256: 49cd6983f7b5ac39969f78f7dd6fc6239062b64d73b7691ad4aef954b5adae74

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