Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f56c623b22d96f9…

MALICIOUS

PDF

45.3 KB Created: 2021-06-11 07:34:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9f4ca3708760266e808599d70cd9cc37 SHA-1: 17f30e8f79c7a47210f2bac3f5293752b6025c7d SHA-256: 6f56c623b22d96f9458233077764abfd42aed3c3488d41fdb0274479f729c7a5
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 0.9864

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/how-to-get-robux-for-free-on-roblox-2021-game-hack PDF link annotation
    • http://digilib.akperkabpurworejo.ac.id/repository/roblox-free-to-play-game_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/robux-hack-easy-2021_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/coin-master-free-100-spin-link_GM406889139.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/earn-free-robux-rbxnow-gg_GM431946152.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/roblox-money-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/village-4-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/how-to-use-wurst_GM479516143.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/2021-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/unlimited-spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/roblox-moderators_GM431946152.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/roblox-jailbreak-unlimited-money-hack_GM431946152.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/roblox-avatar-skin-free_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
stream_004_off0000501f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x501F 26796 bytes
SHA-256: 3842751cc02f4fc989eb34127d025453978a83c0dcd316fa90361e8fac9781aa
font_01_sfnt_off00008cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD8 18756 bytes
SHA-256: b2bee38f70a4e83d2f2d75eef4e033181b12dacd900a1fb53b344cc53db0fcab

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