Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b76a5b5943e91c3…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 00:30:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5174e0fe36030c76af41e23e8359908b SHA-1: ba073b69babc3212d107059a9eb3c17a79921b08 SHA-256: 0b76a5b5943e91c31794a15d68d0327e7d84c58a49cb3e8d3800a26f4a7afb2b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action phrase, luring users with promises of game hacks and free currency. The primary link, http://netcdn.tw/app/431946152/how-do-you-hack-roblox-game-hack, is identified as a redirector, likely leading to a malicious site. The ML classifier strongly flagged this PDF as malicious, supporting the observed lure.

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/431946152/how-do-you-hack-roblox-game-hack PDF link annotation
    • http://elib.acls-indonesia.com/repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/gkt-hacked-through-roblox_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-army-base-roblox_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-spins-coin-master-without-completing-offers_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/roblox-hack-xeno_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-use-speed-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/add-robux_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/minecraft-114-4-download_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/black-jacket-with-blue-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/roblox-download-free-windows-7_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/super-striker-league-roblox-hack_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
font_00_sfnt_off00002fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCC 22320 bytes
SHA-256: 4ccd6409fb91a0526bf7bfbc349b621631a26392d95f4981dd21ff33df13c1ad
font_01_sfnt_off00006189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6189 19292 bytes
SHA-256: 9995eaa591a4ae7360538d13bc69f9b48a4c6000d4d0fc373ba7f602d67ad74d

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