Malicious PDF — malware analysis report

Static analysis result for SHA-256 20f57c1f0b3e0626…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 10:15:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e18a6ed99ebd2817ce16229541cc2e5f SHA-1: daa3ea31e85d6d0b5c20e313b9b792cdbc62eb46 SHA-256: 20f57c1f0b3e0626c2a528f8ab45f95c826a254d42f3eb753a73227dc1e26a79
82 Risk Score

Malware Insights

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

The PDF contains a lure for game hacks and free spins, directing users to a malicious URL. The ML classifier strongly indicates maliciousness, and the PDF's structure and embedded links are consistent with social engineering tactics to redirect users to potentially harmful content. No scripts were extracted, limiting further analysis of the payload.

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/coin-master-free-spins-blogspot-game-hack PDF link annotation
    • http://library.stikessuakainsan.ac.id//repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.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_off000053a1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53A1 24944 bytes
SHA-256: 2a9fd346732f80c624232f53a6a000de095318b944c01ad5c6c7e0615f111e15
font_01_sfnt_off00008cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC2 18464 bytes
SHA-256: 7f13c81e41627db5de1fdc011b77043c9877b216986226f08b9acd2eded814ce

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