Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f204bf27176783e…

MALICIOUS

PDF

35.0 KB Created: 2021-07-08 16:58:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 66fc012864ffa66616b7bfeff19b7cd2 SHA-1: 22021ead4950354229d15391315ce9ca1a6a317a SHA-256: 6f204bf27176783e842b8f7fb9b85f6eefee4522d2726110d0ed97c0cd213986
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to 'netcdn.tw', which is flagged as a known malicious redirector. The document body and heuristics indicate a lure for 'free Robux generators' and 'game hacks', suggesting a phishing or scam attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/free-robux-generator-game-hack In PDF document text
    • http://global-brand.net/userfiles/files/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/premium-software-roblox-hack_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-spin-link_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-free-stars_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-to-open-proxo-roblox-hack_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/speed-hack-for-roblox-download_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-mod-apk-coin-master_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-tips_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/hack-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/cheat-roblox-lumber-tycoon-2-fly_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/android-coin-master-3433-apk-hack_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_off000032c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32C5 22368 bytes
SHA-256: 5f65aaf7e92d98f0e06c18c4ab1c292633094c9ef8f801a8a5c5affbc280388c
font_01_sfnt_off00006477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6477 18820 bytes
SHA-256: da2f915db23b41a878f83961178ff4e79d82bfec54ff52f4ca014625624765bc

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