Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b7a02558c32bc03…

MALICIOUS

PDF

44.5 KB Created: 2021-05-15 02:44:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8526a4c706dea02d97c1579f197ba1cb SHA-1: 1e3f4d581c75a0b5528a017b502df34cd34eac5d SHA-256: 5b7a02558c32bc03959b93d1fce55b4f9d48ff67198ade3f97b91d247be9e119
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a lure related to free game hacks and generators, directing users to a suspicious URL. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to redirect users to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/479516143/free-minecraft-games-for-kids-game-hack PDF link annotation
    • http://gops.pruszczgdanski.pl/images/www-rbxhut-com_GM431946152.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/hack-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/real-robux-generator_GM431946152.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/roblox-character-free_GM431946152.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/real-robux-codes_GM431946152.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/100-hack-coin-master_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_off00004a6a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A6A 24312 bytes
SHA-256: e2fa4c2661142ec78f2d7c8dcfcd346cb92fe25e47c20b518d8906a684b5ba87
font_01_sfnt_off000081c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C0 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00008bcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BCF 18144 bytes
SHA-256: 13e7e5cd67c7f2718453187682e852ca38f83a1f5fffd311a8da849f95858a3e

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