Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b43441add750b17…

MALICIOUS

PDF

47.1 KB Created: 2021-05-12 06:04:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 44d0ba6bf6bd23c83153db27613290db SHA-1: f154ad5fcade5fb58ecf47ea22a42d59b4fe0990 SHA-256: 7b43441add750b17baaa5636623c73582e077488a8a8a1c8a2129648a9210ae9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a lure related to 'free game hacks' and 'free robux', indicating a phishing or scam attempt. The primary URL, https://netcdn.xyz/app/431946152/roblox-sign-in-free-game-hack, is directly associated with this lure. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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-sign-in-free-game-hack PDF link annotation
    • http://plastic-surgery.pl/images/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://plastic-surgery.pl/images/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://plastic-surgery.pl/images/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://plastic-surgery.pl/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://plastic-surgery.pl/images/real-robux-codes_GM431946152.pdfIn PDF document text
    • http://plastic-surgery.pl/images/master-coins-free_GM406889139.pdfIn PDF document text
    • http://plastic-surgery.pl/images/coin-master-deals_GM406889139.pdfIn PDF document text
    • http://plastic-surgery.pl/images/freecoins_GM406889139.pdfIn PDF document text
    • http://plastic-surgery.pl/images/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • http://plastic-surgery.pl/images/wurst-112_GM479516143.pdfIn PDF document text
    • http://plastic-surgery.pl/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://plastic-surgery.pl/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://plastic-surgery.pl/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://plastic-surgery.pl/images/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://plastic-surgery.pl/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://plastic-surgery.pl/images/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://plastic-surgery.pl/images/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://plastic-surgery.pl/images/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://plastic-surgery.pl/images/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • http://plastic-surgery.pl/images/get-me-free-robux_GM431946152.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
font_00_sfnt_off00004a77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A77 27488 bytes
SHA-256: cbfd622c65c1c7895da117e277ff10835f57424b60907204ea9fa6ece74a2604
font_01_sfnt_off0000890d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x890D 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off000095b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95B5 18356 bytes
SHA-256: 0c6b136d59097e1a689858911fb48c20bb16f920676ba78856ab345b09e68bef

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