Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c98f941bed563d…

MALICIOUS

PDF

33.8 KB Created: 2021-06-29 23:32:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3b17fe15e46aeda6043ea16dd1c33a9f SHA-1: 213eeb6e89752052dc88987d78b73800adfd26ec SHA-256: 38c98f941bed563d7300510b2c222176e0476216551ac4d2173371dcb17bf226
122 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a clipboard-command (paste-and-run) lure. 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 0.9980

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/how-to-hack-roblox-jailbreak-with-game-hack PDF link annotation
    • https://new-era.com.tw/image/data/files/synapse-x-roblox-free_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/make-robux_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/codes-for-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/games-that-give-you-free-stuff-roblox_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/pokemon-go-free-online_GM1094591345.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/robux-game_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/how-do-you-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/btools-hack-roblox-download_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/roblox-download_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/roblox-best-looking-free-avatar_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-robux-ohne-handynummer-und-geld-und-stop_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C16 22292 bytes
SHA-256: c9d0ce9ad9a3ffdb9eefec2a93f0cbfe5709edac359ba2087d099276733dff3a
font_01_sfnt_off00005d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8F 19576 bytes
SHA-256: 78ddcd5f71fb8a67163e83c2c8067c1ee0be5a081c2cff4922d2fac734db3ce7

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