Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4949ff9dd24665e…

MALICIOUS

PDF

35.5 KB Created: 2021-07-04 19:13:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f1e2083678ceedf958c02ad4392c0d49 SHA-1: 1ab1579cf53d29f29a1c6a7efe275924560df650 SHA-256: e4949ff9dd24665ec3dd2aaaaeb77ea018ac55d09706d4ef49793b460030b736
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector infrastructure, disguised as a 'free generator / game hack'. The primary lure is for 'Coin Master Free Spins Link 2021 Today', aiming to trick users into clicking the malicious links. The document's structure and embedded URLs strongly suggest a phishing or scamming attempt, likely leading to further malware download or credential harvesting.

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-free-spins-link-2021-today-game-hack In PDF document text
    • http://achauco.vn/public/upload/files/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-roblox-map_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/coin-master-today_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/how-to-hack-roblox-admin-commands-2021_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-flying-practice-place-roblox-a380_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/do-robux-generators-work_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/break-free-dangerous-woman-tour-studio-version-roblox-music-code_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/real-coin-master-hack_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_off0000324c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x324C 22860 bytes
SHA-256: 7d0202fa1dcd69865632313761eaddf629b1496d20f45f6996a83eaf82e545ba
font_01_sfnt_off00006593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6593 19100 bytes
SHA-256: de35a114d8e8c4fc4d70d52a756b20ceb128d757b6ef9e01fa5e276a673837de

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