Malicious PDF — malware analysis report

Static analysis result for SHA-256 c729d6d3ef040a0a…

MALICIOUS

PDF

46.5 KB Created: 2021-05-11 22:12:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 46430c61c63bdebed7a282c6371329d1 SHA-1: 56ebbd10c73aee6c5cfbb7adfd80b96d1f4bda53 SHA-256: c729d6d3ef040a0af881ceb19c9aa06e688d547b176ceb69fbc38292a3b8d584
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and sites offering game hacks, indicating a phishing or malware distribution attempt. The document body and embedded links suggest a lure for free in-game currency or hacks, which is a common social engineering tactic. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 5

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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 https://netcdn.xyz/app/406889139/coin-master-tiradas-gratis-link-game-hack In PDF document text
    • http://sttlets.education/senayan//repository/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/how-to-download-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-coin-master-s_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/roblox-fun-com-robux_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/xray-hack_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/coin-spin-link_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/www-robux-us_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b78.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B78 25660 bytes
SHA-256: 461b8230d95f7d67008f66500e3e57136118d6b79ddf9482419db75f9fc52253
font_01_sfnt_off0000877b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x877B 3604 bytes
SHA-256: 53c09827cafbd071603e477e5fcbea11f3960b91575dbc753320cef998bce221
font_02_sfnt_off0000942e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x942E 17888 bytes
SHA-256: 7e3d0d6e3169ec9d1b4a39f1a8de513868e09ebca0bcabadf274b5e058877262

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