Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b688dd489cf2f3d…

MALICIOUS

PDF

45.4 KB Created: 2021-06-04 04:45:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e1573be62a770c4f74136a502a5530a4 SHA-1: 2e7266f1e8af3fd2ed4b85c33d995e4e31339caa SHA-256: 0b688dd489cf2f3d9c95b499f341e350f08a46ed440b16d2ceaf536f7b800480
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, masquerading as a 'game hack' or 'free generator' to entice users. The document body and heuristics indicate a lure for virtual currency or game-related items. While no scripts were directly extracted, the nature of the links suggests a potential for further malicious activity upon user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/cmo-hackear-cuentas-de-roblox-game-hack In PDF document text
    • http://library.patria-artha.ac.id/repository/free-roblox-glasses_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/tiktok-editor-free-download_GM835599320.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-free-link-daily_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-free-100-spin-link_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-fan_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/hack-client_GM479516143.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-hack-download_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_004_off000052a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52A5 25160 bytes
SHA-256: 6fb423a8f7301ec550f4f7092b3235a05faedf4c83dae5c5d24a8be536149504
font_01_sfnt_off00008d0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D0D 18856 bytes
SHA-256: 0502639bc4dedff38028f71903d8d1dd56a6d33b31cf6ffa2c62a4a372849860

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