Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6468edea4cf8a6b…

MALICIOUS

PDF

35.8 KB Created: 2021-06-25 03:11:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: afaac1612139120d24448ca04a92a62c SHA-1: b031c9bebc6573b65485e7b763b16dfa31fcf3a9 SHA-256: a6468edea4cf8a6bffe2476a31d4bd909a5e8da45456af74f8e5201197724406
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, using game-related terms like 'Free Candy Roblox Script' to entice users. It contains numerous links to external websites, which in turn host more PDFs, suggesting a link farm or a redirector to malicious content. The ML classifier strongly indicated maliciousness, and the PDF structure points to a link farm designed to distribute potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/free-candy-roblox-script-game-hack PDF link annotation
    • http://perpus.i2s-learning.com/repository/hacks-on-roblox-to-change-ur-look_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-level-7-executor-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-code-for-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/robux-for-surveys_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/hacks-master-coin_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-girl-stuff-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-hack-someones-robloc-account-for-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/minecraft-free-education_GM479516143.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_off00003334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3334 22860 bytes
SHA-256: 558d94a1d93588cc5c265200d1c1055c69a0d62a9fa23da389b1de5b0173fff7
font_01_sfnt_off000065f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F5 19404 bytes
SHA-256: 8916864813bf1b06e94feb3878fbe6170cd3f1a64d309c7c901a5db156b6eccd

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