Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b03b05e610c30c…

MALICIOUS

PDF

35.0 KB Created: 2021-06-27 22:15:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 82836d59209a739bbb4651d0f064cc30 SHA-1: 6abef9a7063319ef82df2d991e919bc6f3b2ce7f SHA-256: 64b03b05e610c30c7cac0f8245d77b583196db9b80b49336a637aca77642509f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, masquerading as a 'free generator / game hack' lure. The document body explicitly mentions 'Free Robux 2021 Unlimited Codes For Kids' and includes the primary malicious URL. This indicates a phishing or scam attempt designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/free-robux-2021-unlimited-codes-for-kids-game-hack In PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/freespins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/why-isnt-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-creative-mode-free_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/descargar-hacks-para-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-hack-roblox-account-on-mobile-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/download-roblox-generator-for-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-computer-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/game-on-roblox-free-items-on-the-catalog-no-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-roblox-accounts-that-have-1-million-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-free-online-play-now_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/invisible-hack-roblox-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_off0000300e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300E 22268 bytes
SHA-256: 6ea0caa11e7853d16b55d2b6c6bc09e390cdb96f9e63a24b1735e8a96bf2eb0f
font_01_sfnt_off00006161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6161 19852 bytes
SHA-256: 0b8b251ee06c5ba44fc59de61c1186959c985f62f54e21b1e799450b66d799f2