Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fdcd1ff0f8d58dd…

MALICIOUS

PDF

45.3 KB Created: 2021-06-11 04:19:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 17ee31ab7bf9cfd4b0a7198ee0c3c152 SHA-1: 935a00453c56a0c1006c4a696fa464f228bdf722 SHA-256: 8fdcd1ff0f8d58dd8b4c18a3e9b17c3e38dc55be8e1981453a758a911278b064
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 0.9864

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.tw/app/431946152/roblox-hacked-version-download-game-hack PDF link annotation
    • https://perpustakaan.urindo.ac.id/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/free-roblox-money-codes-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/notoriety-roblox-hack-script_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/without-tiktok-free-followers_GM835599320.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/woman-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/all-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/how-to-get-free-cards-sets-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/roblox-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-spins-on-coin-master-game_GM406889139.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_off00004f79.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F79 26676 bytes
SHA-256: 121bdb842fee05f7ba35dd9c4de9f9cdf40c1ee269c1125b00ced96ef08d4fe7
font_01_sfnt_off00008c4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C4B 18940 bytes
SHA-256: 045b97c0477fa0a77fe25df190f3dc8d91b636a592878cab4dc6788bf6280dbe

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