Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5a5560550bd530c…

MALICIOUS

PDF

44.7 KB Created: 2021-06-09 02:38:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6475f9dd21fe6dd50e7c1e39ce562229 SHA-1: 69781f8b5434894003394d2ceb4bd8b49aa8c243 SHA-256: e5a5560550bd530ce58fc9d6319a54d0712ffaf67955c6a8924ecaaa1f0a17de
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 0.9865

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/a-modded-day-hack-roblox-game-hack PDF link annotation
    • http://repository.unla.ac.id/repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/animation-editor-free-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-how-to-get-free-pet-food_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/easy-way-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/freerobux-hack-us_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/boxing-simulator-2-roblox-free-double-weight-lifting_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-no-verification-hack_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-card-number-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-app_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
stream_004_off000050bd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50BD 24932 bytes
SHA-256: e15ed7717a43624d4332ca129786079cd5999fb0ee53121d005c1cb4bc82cfae
font_01_sfnt_off00008a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A26 18900 bytes
SHA-256: 83d22c2160ce4d02f2d5abb82ebc51c15f93c9cb74420bb3ee5fc46634b08dc2

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