Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ca0793544dae4d6…

MALICIOUS

PDF

49.0 KB Created: 2021-06-09 07:54:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 75148c3a78c0fab3486c6a68cad65028 SHA-1: 2899a28d44d43a0ca2a2e22e46558dfa61fcc36e SHA-256: 8ca0793544dae4d69ab3266719d5eceaa03889b145a46a3cc9985d804ef55f06
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/roblox-jailbreak-jump-hack-game-hack PDF link annotation
    • http://m-sv.net/images/free-robux-working-no-human-verification_GM431946152.pdfIn PDF document text
    • http://m-sv.net/images/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://m-sv.net/images/cm-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://m-sv.net/images/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://m-sv.net/images/coin-master_GM406889139.pdfIn PDF document text
    • http://m-sv.net/images/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://m-sv.net/images/how-to-hack-in-arsenal_GM431946152.pdfIn PDF document text
    • http://m-sv.net/images/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://m-sv.net/images/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • http://m-sv.net/images/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://m-sv.net/images/safe-roblox-hack-sites_GM431946152.pdfIn PDF document text
    • http://m-sv.net/images/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://m-sv.net/images/hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://m-sv.net/images/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
    • http://m-sv.net/images/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • http://m-sv.net/images/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • http://m-sv.net/images/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://m-sv.net/images/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://m-sv.net/images/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://m-sv.net/images/how-to-earn-robux-fast_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
stream_004_off000051c1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51C1 26176 bytes
SHA-256: 86077f68b6f27d1b653d3d781960e836873f06d9d7b33c0dff1ad59f59c0d720
font_01_sfnt_off00008e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E04 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009aab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AAB 19044 bytes
SHA-256: cd05ce4f898d446440033c269292c094f62dc73f3ce8cdf2acd84b985de87b49

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