Malicious PDF — malware analysis report

Static analysis result for SHA-256 01265d2db805f630…

MALICIOUS

PDF

50.0 KB Created: 2021-06-03 05:26:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a46a0947cb06bb2c1f40c476c84165e9 SHA-1: 450df3b0b3ceb9de0ce4d7ad0b0af7f87e5ebdaa SHA-256: 01265d2db805f63036d3b9ab9c6ff401a9dadd1763d4b9f56ca5fb014853a80a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, masquerading as "game hacks" or "free generators". These links ultimately lead to URLs hosted on `netcdn.online` and `pustaka.bbppketindan.info`, suggesting a phishing or scam campaign. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.online/app/431946152/earn-rbx-game-hack In PDF document text
    • http://pustaka.bbppketindan.info//repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-ios-12_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-linux-free_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-game-download-ios_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/pokemon-go-free-license-key_GM1094591345.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spins-link-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-create-group-in-coin-master-free-spins_GM406889139.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
font_00_sfnt_off00004efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EFD 29224 bytes
SHA-256: 9ad99fe3e9c7986342e8a84d840f87bab322402e51ff1ef0e43afea77f30ea56
font_01_sfnt_off00009058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9058 7448 bytes
SHA-256: a76ff9b4805dcff342f7268a16e2e3c2ff2b31b96c381fe4deb6ceea777bce90
font_02_sfnt_off0000a23b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA23B 17796 bytes
SHA-256: c2fa3a7b095d13b8d94e720a6aa77dc3343988dbfb44eb7b7ad06fa4ecb8f8d7

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