Malicious PDF — malware analysis report

Static analysis result for SHA-256 473120c52e24c405…

MALICIOUS

PDF

35.1 KB Created: 2021-06-29 22:55:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f7b9a9c899f4cb0dd4ef87992339ac51 SHA-1: 6911cdbebccc48fe5355ef4cf1784e9b3237fe0b SHA-256: 473120c52e24c4056d95fe5522772c48c81f8ff46109ed9434ca074cc5bebc8d
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free game hacks' and 'robux generators'. The document body and heuristics indicate a lure to trick users into clicking these links, likely leading to further malicious content or downloads. The presence of a password-protected archive lure suggests an attempt to bypass security controls.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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
  • 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.co/app/431946152/can-you-get-roblox-on-switch-for-free-game-hack In PDF document text
    • http://elibrary.smknesbu.sch.id/repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/fireboat-dynamic-ship-simulator-free-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-roblox-accounts-and-passwords-with-100-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/best-free-roblox-explits_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/get-free-robux-points_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/cyberchase-hacker-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/concole-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-place-view-bot-hack-fourme_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-any-player-in-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/www-hack-clients-robloxde_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/best-roblox-hack-executer-free_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-stuff-from-catalog-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/hack-to-get-money-in-gta-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-dress-in-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-com-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
font_00_sfnt_off00003212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3212 22056 bytes
SHA-256: 6fc3ad6734fbc8364a3d1c8f8d8d8f9c5f00104caf4b6d202d495f0adaa83dcc
font_01_sfnt_off000062e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E0 19508 bytes
SHA-256: 28254b6c0f1cae0645e9f8f690f797e46aa1f8c3f0b5ebd5cb835f9a4af7aa57

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