Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e5e90225bc0647a…

MALICIOUS

PDF

37.9 KB Created: 2021-07-05 20:27:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: aa104bd61dab9389a46089b00a010b81 SHA-1: e1876c7f8d1975226c5b03ca7dcc2d7d9df5d9c4 SHA-256: 3e5e90225bc0647a8b4266ebfccea20d3de999f735958f9d316fa25c3140a57c
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 0.9985

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/daily-free-coin-and-spin-link-for-coin-master-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/roblox-for-free-without-downloading_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-steam-codes-no-survey-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/ispoofer-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/get-robux-today_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-peoples-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/blonde-hair-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-rixty-codes_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-hack-2021-john-doe_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-get-free-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/cheat-engine-roblox-hack-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/easiest-way-to-get-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/comment-hacker-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/avatar-roblox-skin-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-roblox-doge-hat_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_off00003931.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3931 23896 bytes
SHA-256: c65a587a9b512b743bd972ac7d15d86dc7f8e1c043a58a0ad269a85d981910b2
font_01_sfnt_off00006f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F9E 18940 bytes
SHA-256: f71fab76f9b711b039f2a5799e9a95f719dae13b70802cf3d13ad63cbd86c9d5

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