Malicious PDF — malware analysis report

Static analysis result for SHA-256 9124cc04806db081…

MALICIOUS

PDF

50.0 KB Created: 2021-05-13 07:08:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e8f953328492f944ca80ded1f92e6498 SHA-1: a02a22743ec20264ef4908b7d06a9e25757856d9 SHA-256: 9124cc04806db08188dd11f56f50c6e0334600990ba6f3a1685c8c4aafce7337
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, with a primary link identified as a malicious redirector for game hacks. The document body, though partially corrupted, contains references to 'Coin Master Download Hack' and a URL that aligns with the heuristic findings. The presence of a visual download button and a lure for recovery secrets further suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8594

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-download-hack-game-hack In PDF document text
    • https://mountainholidaytreks.com/userfiles/files/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/roblox-com-www_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004fd3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FD3 24716 bytes
SHA-256: 972ea492e4b20aff808e624912aa12bc213ae0fba05ffd1788baede9de2c7a4d
font_01_sfnt_off000088ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88EA 4028 bytes
SHA-256: a17c2a746d49ac23b23e38a371e32fddecfcd91b10cf42ff6155bff6b8a07e91
font_02_sfnt_off0000968a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x968A 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off0000a079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA079 18296 bytes
SHA-256: 7196709c2759277e2e42e139668fa96563a46faba9c7eb1d5fb5a9848ee95e79

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