Malicious PDF — malware analysis report

Static analysis result for SHA-256 d91862d1b471e133…

MALICIOUS

PDF

33.4 KB Created: 2021-07-03 22:39:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: db293159fa26436b9a07303bcb6edd2e SHA-1: aba2b5cb1c78cfd76e76bea6bcbbc378a4cfb546 SHA-256: d91862d1b471e13326f65cf029a55a4024225a206983e52a76ac8697b91b7748
82 Risk Score

Malware Insights

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

The PDF document contains a prominent link to a website promising game hacks and free spins, a common lure for malicious redirects. The ML classifier strongly indicated maliciousness, and the PDF's structure and embedded URI point to a redirection to a potentially harmful site. The document's content and heuristics suggest it's designed to trick users into visiting a site that likely hosts further malware or phishing content.

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.tw/app/406889139/coin-master-free-spins-glitch-game-hack PDF link annotation
    • https://nature-air.com.tw/upload/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/king-hack-esp-roblox_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/how-to-get-a-free-shoulder-pet-in-roblox_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/coin-master-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/hack-de-fly-en-roblox_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/free-adidas-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/roblox-pf-hacks_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/dbfa-hacked-roblox_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/free-roblox-accounts-2021-with-robux-december_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/roblox-password-hacker-2021_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/robux-hack-ios_GM431946152.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
stream_002_off00002cd9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2CD9 22700 bytes
SHA-256: 6bff6b1fa7177e40930c9ce92d1c6c4cc0e7ee3dcef2c651efbdc33217ff230c
font_01_sfnt_off00005f8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8C 18416 bytes
SHA-256: 33e7a5adb4aaed326f7acf078be2bcc86209aa83c358f655c81d2ecbcac8adfe

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