Malicious PDF — malware analysis report

Static analysis result for SHA-256 a229eeb179c4b717…

MALICIOUS

PDF

34.0 KB Created: 2021-07-06 07:35:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 28f9324d1b6247fad21a267afc2c8b9a SHA-1: 69ed3bc653f7f6cce32aa788c64db6718114979d SHA-256: a229eeb179c4b7178bf48c3495eba8ca37b4041ec34d52b07a7e9bb55ad3fadd
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector, specifically http://netcdn.tw/app/406889139/free-spin-link-for-coin-master-game-game-hack. The document body also contains this URL and other similar lures for game hacks and free currency. This suggests a social engineering tactic to trick users into visiting a potentially malicious site. No scripts were extracted, but the primary lure is clear.

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/free-spin-link-for-coin-master-game-game-hack PDF link annotation
    • http://digilib.unla.ac.id/repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-spins-coin-master-links-no-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/promo-codes-for-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/gold-cards-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/wurst-18_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/yummers-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-esp-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/add-robux_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_off00002f2a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F2A 22620 bytes
SHA-256: b9fc487aaacf71779c12bde62873dfc7d245de5fc9705967e9a9ff051ed52ef7
font_01_sfnt_off0000617d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617D 18604 bytes
SHA-256: f19d54f8b55e9054799c5fe3eb3858f8baa86cd1dd79e15d2a28d3659dcc94a2

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