Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0a5a1acd4eeccd…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 22:33:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 03524370908eeb4d5b306d25a916e58a SHA-1: 2cb9db2392220ce524cb7f994d61d64533a2147b SHA-256: fa0a5a1acd4eeccda4a9c7983d63b8f67c37ce81fe5dbdc2e8f9952459372453
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF document was flagged as malicious by an ML classifier. It uses a ClickFix paste-and-run lure. 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 0.9832

Heuristics 5

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.online/app/479516143/minecraft-pe-free-download-ios-game-hack PDF link annotation
    • http://lib.baruna-husada.ac.id/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/free-coin-master-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/free-roblox-gfx_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/roblox-scam_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/aimbot-download-roblox_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/how-to-get-free-roblox-money_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
font_00_sfnt_off0000549d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x549D 28608 bytes
SHA-256: c8cea45d035b5c1593ffd37ef83b74749da246817e2e443ac105fb646979e81c
font_01_sfnt_off000092cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92CD 18444 bytes
SHA-256: 9eeecdfb23f1efa52cb61da16af6a6becaf737d5b15e06d56d5bb9cda3007ed5

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