Malicious PDF — malware analysis report

Static analysis result for SHA-256 610b23bdc79dd6df…

MALICIOUS

PDF

32.2 KB Created: 2021-07-06 11:48:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 29737b98a740e285053d9486f25ab84d SHA-1: 096c0bcfd2f6eb884c4d92458bc369f54bad4faa SHA-256: 610b23bdc79dd6df5ad56e62a2d676d4c256cd081f158548707f280043901e22
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, disguised as generators for popular games like Roblox and Coin Master. The document body explicitly mentions 'Free Roblox Website' and 'CLICK HERE TO ACCESS ROBUX GENERATOR', indicating a lure for users seeking in-game currency or cheats. The primary malicious action is redirecting the user to potentially harmful content or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • 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.
  • 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.tw/app/431946152/free-roblox-website-game-hack In PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-cursor-hack_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/como-descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/who-tiktok-free-followers_GM835599320.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/hack-para-atravesar-paredes-en-roblox-2021-en-cualquier-juego_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-groups-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-knife-ability-test-hack_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/claimrbx-com-free-robux_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-paintball-level-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-robux-gift-card-codes-2021_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_off000029dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29DD 21500 bytes
SHA-256: 2cb5660545d53a8cb8d7f6a2e4aada326c1e5e47280cc46ffebaafdc915fd824
font_01_sfnt_off000058bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58BF 19072 bytes
SHA-256: f0d59f1b4b35e580c3840cb277f851b856516c1cfd4bb27d28d5a2db6d497b93