Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f4a0fcebceaa80b…

MALICIOUS

PDF

35.3 KB Created: 2021-07-06 05:17:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ba76ae6dfdf688b36a90d577a8701131 SHA-1: a14dca88a419b540e4eb1bb0f1da1efffa8e77bb SHA-256: 0f4a0fcebceaa80b7d0a2cf0fc39af797e7aed496631b5dfe799415cf12cd8b8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, with a primary focus on 'free spin' and 'game hack' lures, directing users to external sites like http://netcdn.tw/app/406889139/free-spin-coin-master-link-today-game-hack. These links are likely intended to lead users to phishing pages or download further malicious payloads. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/free-spin-coin-master-link-today-game-hack PDF link annotation
    • http://perpus.fisip.unnur.ac.id/repository/no-virus-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-stop-a-hack-script_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-clothes-on-roblox-image_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/best-way-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-prison-life-hack-2021-deutsch_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-meep-city-cheat-codes_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-counter-blox-hack-script_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-coin-master-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-free-spin-group_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-hack-roblox-passwords-2021_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-hack-an-abandoned-roblox-account_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-abonns-hack_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-roblox-accounts-with-robux-that-work-october-2021_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-make-a-private-server-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/is-free-robux-real_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_002_off00003240.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3240 22984 bytes
SHA-256: c1e1469ab4e8cd5b5777f053409b624bb01eaf97eea430f9361937c77c7614d5
font_01_sfnt_off000065f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F1 18696 bytes
SHA-256: 999ecdd706d19f0427b49ef661b374c0ed01ce3167435dc1c975e4b6691a93c3

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