Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc6cb9337bc4143…

MALICIOUS

PDF

47.0 KB Created: 2021-06-13 15:01:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7629e65600ecafa90163715c0c71f07a SHA-1: 1173db189275ca7eda15db3cce8cf55787a101f3 SHA-256: ccc6cb9337bc41439e01fbbcb8134210c12937ba44db6fc97ce5e41c72a74eb3
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to game hacks and generators to entice users. It contains numerous external links, suggesting a link farm or SEO manipulation tactic to drive traffic to potentially malicious sites. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs points towards a download or redirection workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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 http://netcdn.co/app/431946152/idle-animation-roblox-free-game-hack PDF link annotation
    • http://library.forda-mof.org/katalog/repository/download-cheat-for-roblox-counter-blox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/offers-for-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-daily-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spins-whatsapp-link_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-spin-sites-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/pase-bin-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/todays-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/profile-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/real-roblox-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005151.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5151 24576 bytes
SHA-256: 06630f91f32e05a0db66b587386d5ff62fa095308b66d4e2f000b110bc6a07da
font_01_sfnt_off000089a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89A1 2824 bytes
SHA-256: bd082aa73fbb1a8b3bd2e5c998d3d8e31d1dfc71ea36f846af746f69a0d2ab7f
font_02_sfnt_off00009354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9354 18836 bytes
SHA-256: e5e4e5af0882e61fb78ceb7785156a55e4a98f2c3f31a892011634ee8f452685

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