Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca48d35afef8cbe0…

MALICIOUS

PDF

47.1 KB Created: 2021-05-10 20:03:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6c94d82843a53c732074d7356e515f1a SHA-1: 8abda81209e381e3fc88e6e84a16c50b9599bd39 SHA-256: ca48d35afef8cbe0f818ec0ecbce461d62aa7ac504fdccdacef63784f333d918
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/431946152/how-to-get-free-robux-on-roblox-2021-game-hack PDF link annotation
    • http://library.patria-artha.ac.id/repository/free-hair-roblox-boy_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/minecraft-pocket-edition-download-free-pe-calculator_GM479516143.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-unlimited-spins-apk-free-download_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-hack-apk-35-18_GM406889139.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/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-points_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-free-spin-link-app_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_003_off00004ab0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AB0 26640 bytes
SHA-256: 6663387a37ecbe96614692179e6c16afa2c9320c0587b53c078e5470f27cfd22
font_01_sfnt_off00008875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8875 3512 bytes
SHA-256: d2fbe445e4228ea2e3d75d3e8f0f84124f9dd8d3d0cf2c6e4e63bcca92f2519f
font_02_sfnt_off00009409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9409 18756 bytes
SHA-256: 57ee29ca2df633c9559bea9da81b447a7ef2e0dffb4d388bdd233aaad46b31ec

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