Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0ac4dddcb2f2345…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 18:37:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b5abbd8f8abeed209c6d7f02602715b6 SHA-1: 6e8f1da978134fc961b9640f19a5eccf95dedd72 SHA-256: f0ac4dddcb2f2345a15adcfa686f0d67ad6401c767907173ecff3ebb69f45ee3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that are disguised as game hacks and free spin generators, aiming to trick users into visiting malicious websites. The primary malicious URL identified is http://netcdn.tw/app/406889139/coin-master-free-spins-8-14-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URIs strongly suggest a phishing or redirection attack. The ML classifier also flagged this PDF as malicious with high confidence.

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/coin-master-free-spins-8-14-2021-game-hack PDF link annotation
    • http://www.fkunismuh.org/perpustakaan/repository/robux-generator-free-no-sruvey_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/youtube-roblox-pokemon-brick-bronze-free-money_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-hacker-on-urbis_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/cheat-speed-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/mcpe-client_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/flamegg-hack-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/hack-roblox-kick-players-2021_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-app-hacks_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/pokemon-go-font-free-download_GM1094591345.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/comoponerse-hacks-en-roblox_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-hack-games-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-free-robux-no-verification_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_off00003141.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3141 23376 bytes
SHA-256: 8a488af274878b30e4e6800a4abae3c355deddbc410da70655b3de4f389e51c0
font_01_sfnt_off0000661c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x661C 18848 bytes
SHA-256: 70690ff1373fd61655dae8e9e57af48c5305234654d140449416f0890077dc85

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