Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef04792aa05f1612…

MALICIOUS

PDF

44.7 KB Created: 2021-06-04 04:13:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e1f17f043f32063ede30ed253899fcc8 SHA-1: 20cefaa633c483babd472086d5d0d5d73ae11b73 SHA-256: ef04792aa05f16128348e5a1c72e3e066e8d9bbbb72f041d62404118cd96a0ab
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.online/app/406889139/free-coin-master-generator-game-hack PDF link annotation
    • http://pustaka.pn-calang.go.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/oginject-co_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/robux-generators-that-actually-work_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-spins-no-survey_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-free-robux-inspect_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_off000052d3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52D3 26656 bytes
SHA-256: 2a11cc1c77b8db9ff064d368e9fbec5abe2399d9784d49544fcd7673e4457871
font_01_sfnt_off00008e1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E1D 17712 bytes
SHA-256: 257a612313d270105d122f3198241e5dbbd2f563e6a420601a0e3220659a58bd

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