Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a7a380e91c04c58…

MALICIOUS

PDF

31.7 KB Created: 2021-07-05 15:51:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 01dfdaf8e38b442408c8956e930f64a4 SHA-1: 3bef03b7c9fbbe74cce1ffd166d618a47a29fb75 SHA-256: 1a7a380e91c04c58c2849aac460953ced46563876153c035927666fcf5e9706e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/406889139/haktuts-coin-master-free-spin-link-game-hack. This infrastructure is used to lure victims with game-related content, likely leading to further malicious downloads or phishing. The document body and heuristics confirm the intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 3

  • 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.
  • 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/haktuts-coin-master-free-spin-link-game-hack In PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-face-roblox-makeup_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/island-royale-roblox-hack_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-rc7-free_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-get-free-faces-on-roblox-youtube_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-admin-group-roblox_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-download-hacks-in-roblox_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000035e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35E4 23104 bytes
SHA-256: ba34e093a9e24b35e53db0bcd05a495024cda5306d4b8e58163684f8a51ac367

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