Malicious PDF — malware analysis report

Static analysis result for SHA-256 267db63bd2a24671…

MALICIOUS

PDF

34.4 KB Created: 2021-07-08 17:36:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 07015b9b0466aaf7ab9256c090585229 SHA-1: 0fa9222da3eae071d8bca1003c5e48806109bd0e SHA-256: 267db63bd2a24671bc508574467818570c405410cf99e04cd9b5d1ab2d7e279d
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs lures related to game hacks and free generators, specifically mentioning Roblox and Coin Master. It contains multiple embedded URLs that lead to redirectors and potentially malicious content, including CAPTCHA pages designed to trick users. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE
    PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
  • 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 http://netcdn.tw/app/431946152/roblox-free-draw-game-hack In PDF document text
    • http://croatia-flyfishing.com/files/roblox-troll-players-script-hack-pastebin_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/youtube-free-robux-live_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/hack-xp-mad-city-roblox_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/roblox-personal-server-hack_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/free-cool-stuff-roblox_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/how-to-hack-in-roblox-without-recaptcha_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/rbx-claim_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/how-to-hack-your-roblox-password_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/free-robux-place_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/how-to-get-free-coins-and-spins-on-coin-master_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_off00002e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E2A 22940 bytes
SHA-256: 17d0a5dfaf9d9df3fbfa0093cbd9fca00cbec7a5ee1037df20bc5d609e01da42
font_01_sfnt_off00006186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6186 18984 bytes
SHA-256: ec2ea9a8736fae87acb1370247e9a7da9f741958a69bc170a8fbb2ad6495d747

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