Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e606047c078ece4…

MALICIOUS

PDF

35.7 KB Created: 2021-07-06 08:15:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d50019275fb3750e1897f1b247e09f89 SHA-1: 725628ec9b6e32e35a2ae5a07fb2723fccf06185 SHA-256: 9e606047c078ece401ba01043072157eaedee94bd8eb850fd61ed6e56f05cdb3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one that redirects to known malicious infrastructure. The primary lure appears to be a "Coin Master Hack" or similar game-related cheat, designed to trick users into visiting a potentially harmful site. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to unwanted content.

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-hack-2021-android-apk-game-hack In PDF document text
    • http://lib.akper17.ac.id/repository/roblox-redeem-roblox-card-hack_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-scam-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-bux-gg_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/como-descargar-hack-en-roblox_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/trolling-outfits-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-get-free-stuff-on-roblox-2021_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_off0000359f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x359F 22436 bytes
SHA-256: dc335009b3998c3e9ead1883a8d8c0eb83b57b1bfd14b6993d585f96ee2f5d53
font_01_sfnt_off0000676f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x676F 18756 bytes
SHA-256: 72ad81d79aafbf47c073aedbc758c34146f887a61fb970b48a172e8564c4bbba

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