Malicious PDF — malware analysis report

Static analysis result for SHA-256 de5ee4c1de483df6…

MALICIOUS

PDF

35.6 KB Created: 2021-07-04 11:28:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a1d5c1bc06bc3815496230d5adf30bd8 SHA-1: 04c4455ed983914fce38bd8829e0e189157c31cd SHA-256: de5ee4c1de483df6fd9717fbecc3e1abaa1961ed1a5bd342cb364b4b499f559f
142 Risk Score

Malware Insights

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

This PDF document contains numerous links designed to lure users into clicking on game hack generators and free currency offers. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or redirection scheme. The primary URL http://netcdn.tw/app/406889139/haktuts-coin-master-today-game-hack is a strong indicator of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-coin-master-today-game-hack PDF link annotation
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/robux-apk_GM431946152.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/roblox-dragon-ball-z-final-stand-zeni-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/coin-master-jackpot-madness-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/roblox-accounts-free-no-security_GM431946152.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/how-to-bypass-cheat-engine-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/free-roblox-coder-and-builders_GM431946152.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/how-to-get-actually-hacks-on-roblox-not-a-model_GM431946152.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/free-coins_GM406889139.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/coin-master-hack-app-ios-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/free-robux-sca_GM431946152.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/free-robux-obby_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_002_off000031b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31B9 23772 bytes
SHA-256: 38d98b6d8e8fdd692ab326d7d7e1e0f09bf88510e1cbe8886a8b888c7d96259c
font_01_sfnt_off000067c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67C1 18500 bytes
SHA-256: de4287b4d7c6ca7204c59268274f8693e9d2fc3133188a60d6bd2877f4507d7b

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