Malicious PDF — malware analysis report

Static analysis result for SHA-256 23281b0e74bc2451…

MALICIOUS

PDF

34.8 KB Created: 2021-06-30 00:42:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ba0bc1e7075fca39c9a617653786fdb8 SHA-1: e5fc8cb3fdfbdaea928121b156fb198e01db806d SHA-256: 23281b0e74bc2451c9cff374f155c2802a490945178f8c61f494a8725c4b4397
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded links and a document body that explicitly advertises 'Robux Hacks' and 'free generators'. The primary malicious link identified is http://netcdn.co/app/431946152/robux-hacks-that-work-2021-game-hack, which is likely used to deliver a secondary payload or redirect to a phishing site. The ML classifier also strongly indicated maliciousness.

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.co/app/431946152/robux-hacks-that-work-2021-game-hack PDF link annotation
    • http://opac.salatiga.go.id/slims7//repository/coin-master-free-pet-snacks_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/get-robux-free-scrach_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-csgo-cases-free_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/como-hackear-un-juego-de-roblox-desde-ordenador_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-robux-hack-generator-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/withdraw-robux-at-http-free-robux-space_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/bleu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free4mobile-info-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/btools-hack-for-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/como-jugqr-roblox-free_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/can-lucky-patcher-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/roblox-download_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
font_00_sfnt_off00002ee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE2 22508 bytes
SHA-256: de85f44a226050cd9af2052be931d799ed56970145943d70dc7376526bbc7894
font_01_sfnt_off0000612c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x612C 19592 bytes
SHA-256: c5953f9f3795b6b593e37f491f7ca5284695c7ace8721c8a535c334cb49cf612

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