Malicious PDF — malware analysis report

Static analysis result for SHA-256 c80e688d464a03ed…

MALICIOUS

PDF

45.8 KB Created: 2021-06-03 23:40:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2f9f4f92b7856eebb314d24a7f3c1c54 SHA-1: db9637140318c79c95e2aba34eb77072b93ad4ba SHA-256: c80e688d464a03ed4d98f708c43af6cd04bf1fbce94cbe6a9e5b7a49d4eb287c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action phrase designed to lure users to external websites, specifically promoting 'free Robux' or game hacks. One of the primary links, https://netcdn.online/app/431946152/free-robux-codes-no-verification-game-hack, is identified as a malicious redirector. The document's structure and embedded URLs strongly suggest a phishing or scam attempt to redirect users to potentially malicious content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.online/app/431946152/free-robux-codes-no-verification-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-spins-coin-master-2021-glitch_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/apps-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-points_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/7-year-old-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/rbx-website_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_off0000519b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x519B 26124 bytes
SHA-256: f8737916ba9312a58fe2853b4f76f58da1de3dedbdc9dcf5559b16be8559896a
font_01_sfnt_off00008ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED1 18776 bytes
SHA-256: 1501cc25bcf8c3b3bf9df14f68216c1cc39cc5b0131e4343b63bafa21afb9c06

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