Malicious PDF — malware analysis report

Static analysis result for SHA-256 792925affca4f10b…

MALICIOUS

PDF

46.1 KB Created: 2021-05-11 17:03:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ff649d9bbb88e827cd54f9a99b9a8a0d SHA-1: 06921d530c9d34bce480d46b9b21c78f83413085 SHA-256: 792925affca4f10bde7a0c9044dacf63e5f3706ce9470a6fe15221ada26e6f5e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary malicious URL identified is https://netcdn.xyz/app/431946152/promo-codes-to-get-free-robux-game-hack. This indicates a social engineering tactic to trick users into visiting potentially harmful sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/promo-codes-to-get-free-robux-game-hack In PDF document text
    • http://salon-vyshyvanka.com/images/coin-master-hack-unlimited-spins-apk_GM406889139.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/free-executor-roblox_GM431946152.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/hack-master-coin_GM406889139.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/how-to-make-a-minecraft-bedrock-server-for-free_GM479516143.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_off00004b9d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B9D 25180 bytes
SHA-256: d23f6e5158661df96a20a845c588cad8f8b1b0b85e7927ccdab94d7a4f6d1661
font_01_sfnt_off000085ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85FF 3016 bytes
SHA-256: 4c3e2db5174821787a4569c9da4979555510caebd15fb9cea35573c139e242bd
font_02_sfnt_off00009062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9062 18704 bytes
SHA-256: 994ba2c21992eebcab5dcb0bf7b99b22a17e2009da779e2696cdc2096136ed4a

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