Malicious PDF — malware analysis report

Static analysis result for SHA-256 3237919540fdaa65…

MALICIOUS

PDF

41.8 KB Created: 2021-05-15 02:01:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a2c2f5704ae8c196e6008bdf661e4d21 SHA-1: 258501ecee432380259351616de0f0b8a93ef7c3 SHA-256: 3237919540fdaa6507c217553a1b008fa6e109db693ab519642c5c9a583cd060
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic firing for linking to a 'free generator / game hack' redirector, which is a common lure for malicious downloads or phishing. The document body also contains a URL matching this lure. While no scripts were extracted, the presence of external links and the nature of the lure suggest an attempt to trick the user into navigating to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/buy-robux-free-game-hack PDF link annotation
    • http://www.fvsspa.com/images/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://www.fvsspa.com/images/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://www.fvsspa.com/images/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fvsspa.com/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.fvsspa.com/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://www.fvsspa.com/images/free-coins-and-spins-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fvsspa.com/images/coin-master-hack-100-working_GM406889139.pdfIn PDF document text
    • http://www.fvsspa.com/images/roblox-a_GM431946152.pdfIn PDF document text
    • http://www.fvsspa.com/images/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://www.fvsspa.com/images/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://www.fvsspa.com/images/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.fvsspa.com/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://www.fvsspa.com/images/wurst-115-2_GM479516143.pdfIn PDF document text
    • http://www.fvsspa.com/images/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://www.fvsspa.com/images/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fvsspa.com/images/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.fvsspa.com/images/coin-master-free-spins-cheats_GM406889139.pdfIn PDF document text
    • http://www.fvsspa.com/images/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.fvsspa.com/images/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fvsspa.com/images/coin-master-free-spins-link-2021-blogger_GM406889139.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_off000049c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49C0 24248 bytes
SHA-256: fb7be36449e00bb08a8716f53c6682ed35657849ab190e36347587b68a845108
font_01_sfnt_off00008123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8123 18196 bytes
SHA-256: cb12c4d5dde36c76c1d8ec5571b03ead83a0fa8ffdaffe515056ff0ebc75f1e1

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