Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbb3bd99ce907466…

MALICIOUS

PDF

48.6 KB Created: 2021-06-03 09:54:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e03ec1484afb5278bcff2d94d12cdbf8 SHA-1: 09c58a7d5a4b38ed4757fe4aa4f30fb148edba99 SHA-256: fbb3bd99ce907466fb657ef5ee509db976fa6412c49699384c1e3892a4e54beb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generator / game hack' lures. The embedded URLs, such as https://netcdn.online/app/431946152/how-do-you-get-free-robux-game-hack, are designed to lead users to potentially harmful content or further malicious downloads. The ML classifier also strongly indicated maliciousness.

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/how-do-you-get-free-robux-game-hack In PDF document text
    • http://perpus.ar-rum.ac.id//repository/robux-generator_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/get-me-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/roblox-source_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/coin-master-free-spain_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/get-free-spins-coin-master-2021_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
stream_004_off0000531d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x531D 26964 bytes
SHA-256: cec54f0d91f6b800e4268f999622600eb1a8db8dd11642c3db0e66c7286638b8
font_01_sfnt_off0000903c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x903C 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_02_sfnt_off00009a4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A4D 18612 bytes
SHA-256: 37b0398febc23a1417b5642eaebf6c5e0b941c8fdaeae9a9e3ba89062b3e12f9