Malicious PDF — malware analysis report

Static analysis result for SHA-256 445944afa00641f9…

MALICIOUS

PDF

35.4 KB Created: 2021-07-04 02:13:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-12
MD5: b4ae31870437a835cab58cdf50616607 SHA-1: ec38f86a58f4c1feb314df85aa25d9207cedf7c0 SHA-256: 445944afa00641f9b0d61ff367b664c3fdf3a47c44e0b73adbba16cd0ea0d5af
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector domains, specifically advertising 'Coin Master Hack Free Spins' and 'Roblox Free Robux'. These links, such as http://netcdn.tw/app/406889139/coin-master-hack-free-spins-game-hack, are flagged as malicious and lead to known malicious infrastructure. The document body and embedded links suggest a lure for users seeking game cheats, which is a common tactic for distributing malware or conducting phishing attacks.

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/406889139/coin-master-hack-free-spins-game-hack In PDF document text
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/coin-master-free-spins-2021-apk_GM406889139.pdfIn PDF document text
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/coin-master-free-daily-spins-today_GM406889139.pdfIn PDF document text
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/project-alpha-20-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/roblox-free-gamepasses_GM431946152.pdfIn PDF document text
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/coin-master-game-hacks_GM406889139.pdfIn PDF document text
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/free-robux-please_GM431946152.pdfIn PDF document text
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/free-robux-codes-download_GM431946152.pdfIn PDF document text
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/quiz-diva-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/roblox-final-stand-2-cheats_GM431946152.pdfIn PDF document text
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/roblox-20219-robux-free_GM431946152.pdfIn PDF document text
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/free-codes-on-roblox-assassin_GM431946152.pdfIn PDF document text
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/how-to-go-into-somenes-roblox-account-hack_GM431946152.pdfIn PDF document text
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/coin-master-email-free-spins_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
stream_002_off000034e5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34E5 22724 bytes
SHA-256: 54350001d538020ea94192079de62f75093b3e5a2c135dd406f5ce5b53b84328
font_01_sfnt_off0000678d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x678D 18344 bytes
SHA-256: 947667c85d24b0d3a8de245f111eeade861a88a333665e7462fd4878b305e25b

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