Malicious PDF — malware analysis report

Static analysis result for SHA-256 553ee9f7576245c9…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 16:53:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a9f992943dc123c4489cb9dcba8d3d90 SHA-1: 3e7ce718af7d0a46718bbe8844143a0aadd802c8 SHA-256: 553ee9f7576245c969f9431108352b4c58cbc691df9c5a435b60cd69ea11768b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The document body also contains this URL, suggesting the primary purpose is to trick users into visiting a site that likely hosts further malicious content or exploits. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/haktuts-2021-coin-master-free-spin-link-game-hack PDF link annotation
    • http://digilib.stimata.ac.id/repository/coin-master-invite-friends-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/booga-booga-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/admin-command-gives-you-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-hack-xyz-apk-download_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-free-roblox-cards-no-surveys_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-coin-master-spins-and-coins-for-daily_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/generation-for-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-straight-away-cheats-for-money-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-proget-games_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/hack-shark-bite-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/minecraft-free-school_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/pubg-uc-carding-quora_GM1330123889.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_002_off00003152.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3152 22964 bytes
SHA-256: 761fc94e10a9c4e14328992bb9d31c9b6c8f3e3827c99f7b15e7792ad46f4971
stream_003_off0000652a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x652A 18884 bytes
SHA-256: 7fbaae8c74c80ad8c6004c185d9f2f033924c4f14cdb292a6e337190a643b689

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