Malicious PDF — malware analysis report

Static analysis result for SHA-256 73cfd22514d85371…

MALICIOUS

PDF

46.1 KB Created: 2021-05-19 01:51:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: bb1fa48bb8002f4ecc22bab1ba0e7844 SHA-1: 5471f9c9f87c74d24871f1d41cc0c100b3293095 SHA-256: 73cfd22514d853712bdba57c0b41566b158466b8ae90f37c8a2b0a33e91b43a8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-priority heuristic indicating it links to a game hack lure, specifically directing users to 'https://netcdn.xyz/app/431946152/roblox-prison-life-hack-game-hack'. The document body, though heavily obfuscated, contains references to this URL and appears to be a lure for free game currency or hacks. The ML classifier also flagged this PDF as malicious. The primary attack vector is likely spearphishing attachment, leading the user to a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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 https://netcdn.xyz/app/431946152/roblox-prison-life-hack-game-hack PDF link annotation
    • http://inextpresident.com/images/easy-robux-com_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/watch-ads-for-robux_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://inextpresident.com/images/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/coin-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/mcpe-master-hack-unlimited-coins-apk_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • http://inextpresident.com/images/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://inextpresident.com/images/free-spins-coin-master-april-2021_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/hack-coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • http://inextpresident.com/images/coin-master-hack-fast_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048a1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48A1 26700 bytes
SHA-256: 6be2ff157ea074bbdeff303f4faf7d49059cc39ed040d9213cbd98e5eb32d624
font_01_sfnt_off0000849e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x849E 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9145 18456 bytes
SHA-256: 407d6fb8d9efb45a2b1cddcfd151d3a069902e857cdd2d484da7c19786549282

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