Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f9c348849c01d17…

MALICIOUS

PDF

35.4 KB Created: 2021-07-04 01:26:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cf4438acaeddbea28f9c6eee70e181ea SHA-1: 10eca5691050cae9c7251caf7025588bc88c6297 SHA-256: 0f9c348849c01d1719d8a04b68e745ff579e6510c8ca37fdf48d1849c21c714b
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure for game hacks and generators, directing users to a known malicious redirector. The document body and heuristics indicate a strong intent to trick users into downloading a password-protected archive, likely containing a secondary payload. The primary IOC is the malicious redirector URL used to host the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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-version-2021-download-game-hack In PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-roblox-badges_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-mm2-how-to-get-free-coins_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-roblox-trades_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/pubg-uc-carding-method-2021_GM1330123889.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-spin-link-free_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-admin-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-menu_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-online-hack-no-survey-no-password_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-windows-10-edition-hacks_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/como-hackear-ropa-en-roblox-de-personas_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
stream_002_off000031d7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31D7 22948 bytes
SHA-256: fb99851d278d365f69fe6df42bea9ca4a5d0aaf35a149cee7342611f5bfc776e
font_01_sfnt_off0000652c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x652C 19120 bytes
SHA-256: 57291a1557c3b3cfaf2211bc97aa7d4df3f086592edbbb7333689b1754ce491f

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