Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4f8a670626c8307…

MALICIOUS

PDF

34.1 KB Created: 2021-07-08 15:11:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 51dab776f4da830cf538bbe7264d85b0 SHA-1: 9859a3500820f662032a684a8cc5d18968be18c9 SHA-256: c4f8a670626c8307b41859b58fc7e1ce1a82e1af6d9348a346e4efde83014850
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to malicious redirector infrastructure, specifically advertising 'free generator / game hack' lures. The embedded URLs, such as http://netcdn.tw/app/406889139/100-free-spins-coin-master-game-hack, are designed to trick users into visiting potentially harmful websites. The document body and heuristics confirm the intent to lure users with game-related scams.

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/406889139/100-free-spins-coin-master-game-hack In PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/no-robux_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-get-btool-and-hack-roblox-jailbreak-2021-febuary_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/roblox-games-free-sign-up_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-robux-traders_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/hack-master-coin-pc_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-stop-attack-hack_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/roblox-tix-hack-no-download_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-get-free-tiktok-coins_GM835599320.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/eyes-the-horror-game-update-2-alpha-hack-roblox_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-online-roblox-water-slide_GM431946152.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_off00003164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3164 21996 bytes
SHA-256: c396cebf9934576f7512d1474aea2fdedefde53466434e04c538985ff98a4ba1
font_01_sfnt_off00006221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6221 18452 bytes
SHA-256: d0c04ff51ad59f6355ad4f24aeb86ad145506544650f67de66568f082738138f

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