Malicious PDF — malware analysis report

Static analysis result for SHA-256 a973166ab17d1e75…

MALICIOUS

PDF

37.0 KB Created: 2021-06-27 23:54:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 979849174d28a3b477e7e6dd3b2bd7f8 SHA-1: 5332e571010fc5920683d153f40a57fa5f5e070f SHA-256: a973166ab17d1e754fd1ef175fcee95d2289791d0899e552fbe2d94236b6fdbd
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for 'free Robux' and game hacks, directing users to a suspicious URL. This indicates a social engineering tactic to trick users into visiting a potentially malicious site. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-robux-no-human-verification-or-survey-or-download-2021-game-hack PDF link annotation
    • https://morishita-tc.com.tw/image/data/files/lucky-patcher-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/game-toolbox_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/cheats-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-with-fake-credit-card_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/pokemon-go-free-promo-code-2021_GM1094591345.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/robloxfun-com-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-jojos-bizarre-adventure-script-hack_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-jailbreak-hacker-transparent_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-roblox-exploits-no-download_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/fb-coin-master-free-spins-link_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_off00003487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3487 22580 bytes
SHA-256: 7dcbfd48b1540c9268f855e3679eb5e7a9f5ac57b705cef76583d9557e07d3ca
font_01_sfnt_off00006724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6724 20608 bytes
SHA-256: 84e083980845d6db402b7178d67bc98d29f4cdbc71d93f4e93f474fc98f39a9a

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