Malicious PDF — malware analysis report

Static analysis result for SHA-256 58dd4463cad1f671…

MALICIOUS

PDF

44.8 KB Created: 2021-06-07 04:15:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8221e903fd35c83a37ce0a875ee8b8d6 SHA-1: d222adbdb642b9744643c8b1b92a3b125bde4955 SHA-256: 58dd4463cad1f671d2a906cdf1a80beee73f6e9445ee411e0795803c982cd246
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/new-code-speed-hack-roblox-game-hack PDF link annotation
    • http://opac.disarpus.surakarta.go.id/repository/minecraft-free-download-android-apk_GM479516143.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-get-to-village-3-in-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/minecraft-116-1-download_GM479516143.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/archery-master-3d-coins-hack_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/https-rbx-place-rewards_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-get-free-spins-on-coin-master_GM406889139.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_004_off00004d8a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D8A 27328 bytes
SHA-256: c6b472d8cf4ab6abc0c9bc25c511b453be84232e522f1f52910b2cb0a7ad2f22
font_01_sfnt_off00008b05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B05 18696 bytes
SHA-256: 1d722261ed16530eea9c1206982be878de35e6a58fab58cc7cb3aae53d71a3d2

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