Malicious PDF — malware analysis report

Static analysis result for SHA-256 b510e5073d29d08c…

MALICIOUS

PDF

47.8 KB Created: 2021-05-16 19:42:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d36f628bd8cc46ff8114099a17697146 SHA-1: 49e179bf407ebfc74f937538ad76c34ff3231a31 SHA-256: b510e5073d29d08cbb1b860c3eadb5bde06c09ce1fd8beab856bdb4c2ab99efb
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 0.9977

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/roblox-hack-generator-game-hack PDF link annotation
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/free-coin_GM406889139.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/fast-robux-online_GM431946152.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/download-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/free-coin-spin_GM406889139.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-cheats-free-spins_GM406889139.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/free-spins-on-coin-master-iphone_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_003_off00004c4c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C4C 34852 bytes
SHA-256: 662b989dc9696997195882d902315d8e90d21ca80e73ecc1490fccdfb5a9950b
font_01_sfnt_off0000988d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x988D 18284 bytes
SHA-256: 25a7dda4fa93a15709e62d61065895c31c9e65ce27a7c8bbaa34224db667a0ef

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