Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b90f05870b6c153…

MALICIOUS

PDF

42.4 KB Created: 2021-05-17 14:09:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f9b7caeca430dbed4f69741e376a3677 SHA-1: 1899c5f1cc2e8971388cba2b3b4747ed48cdd200 SHA-256: 5b90f05870b6c1538e362c95e72f14de204aabaca9b166026fbb38d325ee9d9d
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 0.9971

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.xyz/app/431946152/inappropriate-roblox-game-hack PDF link annotation
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-free-download_GM431946152.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-coin-master-s_GM406889139.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/block-best-robux_GM431946152.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-100-spin_GM406889139.pdfIn PDF document text
    • http://kpu-denpasarkota.go.id/new/public/ckfinder/userfiles/files/earn-robux-for-roblox_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
stream_003_off000048fc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48FC 25012 bytes
SHA-256: 6924fb8acfb45cda728cf51786276d98c0652a6a455a958f51228b18d77edafa
font_01_sfnt_off000082d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82D8 18412 bytes
SHA-256: 9f3a6c149e2e02a3e3a6e6c60675a112b4ad605b0f15a5c3bf146a5a78a21490

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